Holley date codes

The four digit date code began about 1972 so your assumption of 77,87 is valid. I believe Holley discontinued the 2818 in the 90s but recently has resumed reproduction. The carb was installed at the assembly plant in St Louis so any date within the 6 months prior to your cars DOB is NCRS correct. The date code was in the form year/month/week.

Date codesHolley carburetor 3139-1 4 bbl 3874898 er date code 1903 chevelle 396 chevy Holley date code chartPurchase holley 450 cfm matching tunnel ram 4 bbl carbs (2) list 9776 date code 0187 in lorena. Holley 1904 Carb Question - Page 4 - Ford Truck Enthusiasts Forums.Building Holley's Latest Giveaway. Jeff Huneycutt. 04/02/2024. tech. ADS Suspension 2021-2024 Ford Bronco control arm. New ADS Suspension Components for 2021-2024 Ford Bronco. Steven Olsewski. 03/28/2024. tech.Find many great new & used options and get the best deals for 1969 FORD 428 CJ #4345 HOLLEY CARBURETOR #C90F-9510-H (DATED 8A2) at the best online prices at eBay! Free shipping for many products! ... origin ZIP Code, destination ZIP Code and time of acceptance and will depend on shipping service selected and receipt of cleared payment. Delivery ...They had 450 cfm 4 bbl carbs to be used with the intakes for best mpg. If you could go from 12 to 15 mpg you were happy. Some folks really drove @ 55 mph, they were looking for max mpg at low rpms on the freeways. Some claim to be getting 20 plus mpg.Holley date code question. Jump to Latest Follow 4K views 4 replies 2 participants last post by FEandGoingBroke Aug 15, 2007. 1. 1969SCode Discussion starter 292 posts · Joined 2006 Add to quote; Only show this user #1 · Aug 15, 2007. I'm trying to decode a holley date. The #s are: C7OF-9510-C ...This carburetor was made by Holley , The Holley Brothers Company was started in 1905 in Detroit Michigan then became the Holley Carburetor Co . It is a H4-4150 . This carburetor has a part number of R3795 LIST 3795 and used on 66-68 Ford . Check here for specific Muscle car Info: Referenced by ; Holley R3795 or LIST 3795 ...Dominator EFI Tuning & Tech. May God's grace bless you in the Lord Jesus Christ. '92 Ford Mustang GT: 385"/6.3L SBF, Dart SHP 8.2 block, Eagle 3.470" forged steel crankshaft & H-beam rods, Wiseco 4.200" forged pistons, Trick Flow Twisted Wedge 11R 205 CNC Comp Ported heads, 12:1 compression ratio, 232°-244° duration/.623" lift/114° …One of the most trusted carburetors of all times -the 1850! Its 600 CFM of airflow, vacuum secondaries, single fuel inlet and mechanical choke makes it amazingly universal. The 1850C has a Gold Dichromate finish for corrosion protection and classic Holley looks. Don't trust your performance to just anyone, Holley is the only modular carburetor company that has been in business for over 100 ...

3310 was only used as a factory installed carb on the 1965 Z16 Chevelles, as far as I know. So a Dec. 1968 date code would be an over the counter speed part, either from Chev. or from Holley directly. Jeff Helms. -65 Z16 Survivor (Red/black/white int.) ( Survivor Z16 Picture album)Date codes are found on the carburetor air horn. Expect to see three lines stamped in factory installed and service replacement Holley carburetors-Ford part number, Holley List number, and the ...Trending at $494.95. Find many great new & used options and get the best deals for Holley 2818-1 Corvette Carburetor 3849804 Date Code 8b3 at the best online prices at eBay! Free shipping for many products!Find out the Six Pack carb numbers and date codes in my article, 440 Six Carb Numbers and Holley Date Codes. Mopar 440 Carburetor Identification and Numbers; 413 Max Wedge Carburetor Specs; Also, check out the 426 Hemi fuel pump specifications. My uncle had two Hemi carburetors on the shelf in his garage. Every time we visited him I would ...Video. Sniper EFI Videos. Someday you may need to take a data log from your Sniper EFI system. Today I'm going to discuss two different ways you can take a data log using your 3.5" LCD and the Sniper PC software. How to open them using the Sniper software and how to e-mail them to somebody for review. author.The Holley Illustrated Parts & Specs Manual states thus: LIST-3418-1A (1AAS) IS an OEM Holley carb, listed for 1966/1967 Corvette 427 engine, 425 horsepower, looks like the real deal. ... You would need to have a three digit date code starting with 6 or 7 for that to be an assembly line carb.

That's right, Black Friday, Cyber Monday and four solid days of deals. From Friday, November 25th through Monday, November 28th, 2022, if you were holding out for great deals from Holley's family of brands, now is the time to act! Take a look at just a sampling of the items that you can find deals on this weekend:Date codes and part numbers for 6-Barrel/Six-Pack applications. The carbs all have "list numbers" and date codes stamped on them. The date codes are 4 digits. The first three are for the day and the forth is the year. The "list numbers" for 1969½ carbs are as follows: Front outboard carb 4-speed and auto - List - 4393Date Codes . Home Choke Circuits Date Codes Exploded View Part Numbers Q & A Setup Specs Vacuum Secondary Spring Chart ... Holley Four-Digit Date Codes. First Three Digits. Fourth Digit. Julian Date Stamp. Month. Year. Regular Year. Leap Year : Stamp. Year. 001-031. 001-031. January. 3 . 1973/1983/1993: 032-059. 032-060.Hello all, I have a holley 3139 carb , from what I found so far, it seems to be a 65-66 396 carb. It has the 3874898 ER on the top, list 3139-1, and the date code of 5A5.Holley carburetors used in a Ford factory application use either a three-character date code or a four-character date code depending on when the carburetor was produced. Holley used three-character date codes for the carburetors originally used on 428 CJs and SCJs. The four-character date codes began appearing on OEM and aftermarket carbs …Holley C9AF-9510-U 4609 carburetor 384 date 1969 Mustang Cougar 428 cj cobra jet. Opens in a new window or tab. Parts Only. 5.0 out of 5 stars. ... Holley 4-Barrel Carburetor 2668 Ford Galaxie 427 410 Mercury Q-Code 1963 1964. Opens in a new window or tab. Parts Only. 3.5 out of 5 stars.

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Save up to 10% OFF with these current holley coupon code, free holley.com promo code and other discount voucher. There are 11 holley.com coupons available in May 2024. Greenpromocode.com. Stores; ... The code has expired. Check the expiry date of the code, as some of them run for a limited time or expire after a set period.Holley started using 4-digit date codes in 1973; original '67 carburetors had 3-digit date codes that started with either a "6" (for 1966) or a "7" (for 1967). For 3-digit date codes, the first digit is the year, the second is the month of the year, and the third is the week of the month.Holley EFI V5 firmware update for 7" Digital Dash, Version 5.0.7. 7 in. Digital Dash Firmware - V4. Contains the latest V4 553-106 7" Digital Dash Firmware, includes Digital Dash Tuning Software. 7 in. Digital Dash Firmware - V2/V3. Holley EFI V2/V3 7" Digital Dash firmware and instructions. Get help from other Gear Heads!Below the list number is a date code that will contain no more than four (4) digits. See Figures below. Figure 1 Figure 2 Figure 3 Figure 4 Figure 5. EXPLODED VIEW - MODEL 2010. NOMENCLATURE - MODEL 2010 Ref. No. Description Ref. No. Description 1 Choke Lever and Swivel AssemblyFast Idle Cam Plate Screw 2 3 Fast ...Author Topic: Holley Date Code (Read 3609 times) KRB5000. Newbie; Posts: 10; Holley Date Code « on: January 19, 2010, 03:01:28 AM ...

Guys, I am looking for a correct date coded Holley 4088 for the GTE. I have been offered one with a late October 67 date code, and another with a late March 68 date code. The car is build date April 8 1968 Fortunately, when the original owner replaced the carb (The current carb on the car is a Holley 3310-2), they retained the original metal tag, which has a 7L8 (November 8, 1967) stamp. I ...Use the handheld to navigate to File > ECU HW/FW and select "Upgrade ECU Firmware" and the ECU will be updated with the correct firmware that is on the SD card. At that point you should be able to re-run the setup Wizard and have everything work perfectly. I hope this is helpful! Chris Myer. 800-880-0960.Trending at $494.95. Find many great new & used options and get the best deals for Holley 2818-1 Corvette Carburetor 3849804 Date Code 8b3 at the best online prices at eBay! Free shipping for many products!Apr 2, 2014 · I have a question about the date coding on a Holley 600 cfm carburetor - C8OF-9510-D. Would a date code of 7B4 be correct for a 1968 Cougar XR7 GT produced on 12/19/1967? I understand that 7B4 means the 4th week of December 1967. Logic seems to indicate that the 19th would be the 3rd week of December using Sunday as the first day of a week in the count. Thanks! Steve Date Code System Change. Prior to using Hermle movement date codes, early movements before the year 1987 have just the stamp of the year on the back of the clock movement, 81 just means 1981. From 1987 on they used letter codes instead of numbers to represent the year made. Such as the year 1988 is only marked with the letter A instead, and ...The Holley Illustrated Parts & Specs Manual states thus: LIST-3418-1A (1AAS) IS an OEM Holley carb, listed for 1966/1967 Corvette 427 engine, 425 horsepower, looks like the real deal. ... You would need to have a three digit date code starting with 6 or 7 for that to be an assembly line carb.Holley started using four digit date codes in 1973. So I second what Velox said about the year of manufacture being 1978, 1988, etc. Holley has made special production runs of various carburetors over the years. I have an undated List 3810 that was purchased new in 2006.Have a Holley 4555 carb date code 051 off of my 70 LT1 vette that no longer has the original block so this carb needs to go to someone that needs it for a restoration. Carb has all its original parts such as the metering blocks, fuel bowels ect. All moving parts move freely, it has been sitting along time so it will need a kit. $750 includes ...Jan 7, 2006 · On a related note, my car was started the 4th week of May, 1968 (05D) and the carb is dated 833 like chedderboys. The 4053 carbs were built in batches and I've seen several 4053's with this date stamp. Now, I'm not sure when the batch before that was built, or the batch after that, but usually, the Holley carbs are a few days to several weeks ... D: 1970's. E: 1980's. F: 1990's. All Ford carburetors have the number '9510' in them. An example of a complete carburetor number as it might appear on a tag: D3TF-9510-CC. D means the 70's decade, 3 means 1973. In our lists, we abbreviate this number as D3TF-CC because all carbs have a '9510' number. Ford, Autolite, Motorcraft carburetor numbers.

The Holley Carburetor date code is 881. Additional information. Weight: 14 lbs: Dimensions: 12 × 12 × 8 in: Related products. 1971 HOLLEY CARBURETOR 454 LS6 LS7 $ 1,199.00; HOLLEY LIST 3245 L 79 NOVA $ 1,599.00; Holley Ford Carburetor 4160 450cfm $ 500.00; Product Search. Search.

C1 & C2 Corvettes - Holley Carburetor Date Code Correct? - My car was born on Tuesday June 14th 1966 according to the Shipping Data Report. My Holley carburetor horn is stamped with part number 3367 and the date code is 663. If I am reading this correctly, the carb would have been produced in 1966, the 6th month and...Feb 27, 2009 · And yes, the date codes on Holley carburetors are decoded as follows: first number is the year (in this case 1969), second number is the month (in this case 4 = April), and the third number is the week it was produced (in this case 2 = second week). Although Holley employees will take part in answering questions from time to time, your questions may or may not be answered by Holley personnel. Thus, Holley can not guarantee an answer or timing on an answer. ... Join Date: Dec 2021; Posts: 8; Share Tweet #1 Sniper backfire at intake during acceleration. 12-04-2021, 02:18 PM ...Most batteries have expiration date codes, indicated by stamps on either the battery itself or on the packaging. Expiration dates differ from the date of manufacture, so users must... Note the date code of 072 indicates it is a dealer service part since the date code is 1970, July, 2nd week. Another 3310 Holley (GM number 3878261EH) used on the 1965 396 L72 (Z16) engine. Again a service part with a date code of 142, or 1971, April, 5th week. Holley 3230 4-barrel carburetor dated 502 - 5=1965, 0=October, 2=2nd week. Congratulations on finding Take advantage: up to 45% discount at Holley Girl, a once-in-a-lifetime offer. For now, you can have access to Take advantage: up to 45% discount at Holley Girl. You will save $37.9 on average in Take advantage: up to 45% discount at Holley Girl. Don't forget to check the expiration date of Coupon Codes so you don't ...Jan 25, 2015 ... That's one thing that drives me crazy about Holley carb date codes. They're a 4 digit number, like 2356. The first 3 numbers are the day of ...This is model 4053 dz someone is selling on at e-bay however the date code is 281. I thought the dates went by year/month/week. Can anyone tell me where I can find the info on Holley date codes? ... According to the published info in my books the Holley Carb date code reads Year, Month, Week. Hope this helps. wot. Save Share. Like.Holley LS Fest. 146,120 likes · 3,136 talking about this. Holley LS Fest is a celebration of everything and anything powered by the incredible GM LS engine!Date codes and part numbers for 6-Barrel/Six-Pack applications. The carbs all have “list numbers” and date codes stamped on them. The date codes are 4 digits. The first three are for the day and the forth is the year. The “list numbers” for 1969½ carbs are as follows: Front outboard carb 4-speed and auto – List – 4393

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C3 General - no carburetor date code - Hello, The 3 carburetors on my car have the Chevrolet number and the List number, but no date code stamping. ... The original carbs have the 3 digit date code, and the replacement new carbs i bought from Holley do not have them- although there are vendors that will stamp them for you for about $100.00 each.Holley 3419 3886087EJ date code 5A5 carb. Jump to Latest Follow 725 views 7 replies 2 participants last post by Steve67L-79 ...dyno jonn. 4759 posts · Joined 2002. #2 · Jul 16, 2012. E1 is the number that the assembly line workers looked for when they need that carb to go on the engine that was supposed to get a 3247 carb. Shorter numbers were easier to remember than 3886101 or 3247. Jon N. ~ The person who doesn't listen to the media is the best informed.Don't make things more awkward than they have to be.This one's date code is 764, which translates to it being manufactured in the sixth month (June), 4th week of 1967. (It doesn’t have the center main body that “re-issued” carbs generally have and the date code is far earlier) I don't know that Holley stamped past date codes that early onto re-issue carburetor air horns either.Although Holley employees will take part in answering questions from time to time, your questions may or may not be answered by Holley personnel. Thus, Holley can not guarantee an answer or timing on an answer. ... Join Date: Dec 2021; Posts: 8; Share Tweet #1 Sniper backfire at intake during acceleration. 12-04-2021, 02:18 PM ...When the code extends to four or five digits, the initial one or two digits denote the year. So, 3156 would be read as June 5, 2023, while 22156 signifies June 5, 2022. To swiftly decode the three digits representing the date, you can refer to this helpful Julian calendar.Date code type Code meaning Example Components typically found with this type of date identification; A: Alpha-numeric 2 digit code: ... master cylinder, power steering gear, windshield wiper motor, Holley carb, Carter carb ID tag, hoses, Radiator, Hood catch , hood latch, emergency brake mechanism: E2: Four digit: Day, Month & Year: 10 9 69 ...Holley Carburetor Model 2300-C Instruction Sheet 199R8338 TYPICAL VIEW The exploded view shown is typical of the model carburetor this kit will service. The view may differ slightly from the actual carburetor ... Date: 2-3-11 . Title: Holley Carburetor Model 2300-C Author:<p>Holley Carburetor 3139-1 4 bbl 3874898 ER Date Code 1903. Came from a local estate. untested. Linkages move freely. Comes as seen in the photos. Selling for parts or repair as will need rebuilt. Free shipping to the lower 48 states only. </p><br /><br /><p>tote 14 </p> ….

Holley EFI Version 3. V3 Software Overview. DOWNLOAD AND READ THIS FIRST. Includes V3 updates and information. V3 is updates are not needed for most users. Holley V3 Firmware. Contains V3 Build 140 firmware - For use with Dominator and HP ECU's - DO NOT USE WITH TERMINATOR X. Holley V3 Software.22GT. 39088 posts · Joined 2009. #6 · Jun 13, 2013. If your engine is a stock non HP engine, a 715 cfm LeMans carb is overkill. And if it's date-coded to the 65-67 period, easily worth $1000. The small-letter manifold is no slouch, either. Amateur restorer. Well, sometimes I have been paid for it. But not right now.This one's date code is 764, which translates to it being manufactured in the sixth month (June), 4th week of 1967. (It doesn’t have the center main body that “re-issued” carbs generally have and the date code is far earlier) I don't know that Holley stamped past date codes that early onto re-issue carburetor air horns either.There is a GM Part No, Holley List No and Date. I am not familiar wiht the other number. The date code for assy line is a three digit date. The first digit is for the year, the second digit is for the month 1-9 = Jan-Sept and 0=Oct A=Nov B=Dec, the third digit is the week of the month. 5A3 would represent 1965 - Nov - third week.Significant new changes means something is wrong. • Check the fuel pressure and fuel system components for leaks and restrictions (wiring, plumbing & venting). • Use the appropriate amount of timing advance at idle. Stock cam - 20°, performance cam - 25°, radical cam - 30°.Holley Coupon Codes 2023. 16 Verified Coupons - last updated: October 22,2023. SUBMIT A COUPON. 12% OFF. 12% Off with Holden Promo Code. Verified • uses.15 Apr 2013 ... there will be the number 3447SA and next to that or below that stamping there will be a date code stamped on the same ear. For example a carb ...C1 & C2 Corvettes - Holley 3811 date code - Any wisdom on my carb. It is a 3811 / 4160 with a date code of 0503. Everything that I can find states that this Carb was only used on the 1967 390 HP 427. Does 05 mean 1965, O mean October and 3 mean third week? Or or is this a newly issued Carb by Holley? Some sources show...The carb was installed at the St Louis plant so a typical correct carb would be dated about 2-4 weeks prior to the cars assembly date. Holley date codes went to 4 digit code around 1970 Last edited by Donald #31176; 03-07-2009 at 12:25 PM .Apr 20, 2011 · The date codes on factory Holley carbs were 3-digits up to 1973, and 4 digits thereafter. The 3 digit format was year-month-week, and the 4 digits were julian date (day 001 to 365 of the year) and last digit of year (doesn't clarify which decade though). Holley date codes, Deciphering Ford Parts Date Codes. Casting dates show the exact day, month and year a certain part was made or cast. The typical casting date looks like " 6M08 ". Breaking down a casting date: 6 = The year of the decade. "6" for 1976. M = The letter of the month. (December), Oct 25, 2010 ... I found an original Holley 4150 C7OF-9510-B list 3794 for my '67 Cougar GT 390 4V C6. The date code is 605, which translates to 1966, October, ..., 1967 through 1969 Holley The identification number and the date of manufacture are stamped into the forward vertical surface of the air horn. The three digit date code is broken down with the first number being the year of manufacture, the second number (or letter) being the month of manufacture (1 through 0 for January through October, and then the letters A and B for November and December ..., Although Holley employees will take part in answering questions from time to time, your questions may or may not be answered by Holley personnel. Thus, Holley can not guarantee an answer or timing on an answer. ... Join Date: May 2014; Posts: 722; Share Tweet #2. 01-17-2022, 04:57 PM. Timing at 12° not high enough. Timing at cruise is too high ..., I have read conflicting information on what date codes were used for original and replacement Holley carbs during the 70's. I just purchased a carb that the seller stated up front is a factory replacement carb and not to be confused with a correct date coded carb that can be used on a numbers matching car. The stamping on the air horn reads ..., If your Holley carb has a FOUR digit date code...that code was ONLY used for aftermarket carbs... The Holley 4-digit date code is based on the Julian callender.-The first three digits are the day of the year. (a littel math involved...sorry) 1-365 except for "leap-year...1-366.-The fourth digit is the LAST year of the DECADE. 1967/1977/1987/1997-, Holley started using 4-digit date codes in 1973; original '67 carburetors had 3-digit date codes that started with either a "6" (for 1966) or a "7" (for 1967). For 3-digit date codes, the first digit is the year, the second is the month of the year, and the third is the week of the month., Ford and Mustang bellhousings flywheels. 427 Tunel Port, 427 Cammer SOHC, Mustang Boss 429 BOSS 351 and BOSS 302 parts ID decode and date code decoding Shelby Ford Mustang 289 302 351 390 406 427 428 429, K code hipo, cobra jet, Boss, Intake manifold, Exhaust manifolds valve covers gaskets, classic race vintage images pictures., JohnZ. 7729 posts · Joined 2000. #2 · Dec 9, 2009. 0090 is the date code - it's the 9th day of 1980, 1990, or 2000. If the bowl screws are hex instead of slotted, it's probably 2000. :beers: JohnZ. CRG. This is an older thread, you may not receive a response, and could be reviving an old thread., Unreal. 7608 posts · Joined 2001. #2 · Dec 1, 2003. In 68 (which could have a 67 date) the 4053DZ was used on Z/28, L78 b/b Camaro, Chevelle and Nova, as well as L72 Impala. In 69 it was a Z/28 only carb. The L72 and L78 used a 4346, which is essentially the same carb with (I think) different jets. The vacuum ports on the base plate are ..., It is authentic for 1969. Because of that date code that is way passed the end of 65-67 GT350 production the desirability is only slightly better (because of MFG differences ) then one of the new re issue carburetors that are available now. Logged. Bob Gaines,Shelby enthusiast, Shelby collector , Shelby concours judge SAAC,MCA,Mid America Shelby., Although Holley employees will take part in answering questions from time to time, your questions may or may not be answered by Holley personnel. Thus, Holley can not guarantee an answer or timing on an answer. ... Date code: 20180830 FW Ver: 4.0 build 110 Profile #1 TPS Calibrated: Yes HEFI type: HP And other info on GCF file and time stamps ..., Technical Information. Tech Service: (502) 781-9741. Holley Carburetor Numerical Listings. Carb. Primary & Primary Secondary Primary Secondary Primary Carburetor Model CFM Renew Trick Secondary Main Main Jet Metering Metering Primary Discharge Part No. No. Kit Kit Needle Jet or Plate Block Block Power Valve Nozzle & Seat Size. 0-84781 4150 850 ..., As for reading date codes on Holley carbs, there are 3 digit dates and 4 digit dates. The 3 digit dates lasted until about 1973. The first digit is the year. 6 = 1966, 0 = 1970. The second digit is the month. 2 = February, 9 = September, 0 (for 10) = October. The last two months used letters, A = November, B = December., Date codes are found on the carburetor air horn. Expect to see three lines stamped in factory installed and service replacement Holley carburetors-Ford part number, Holley List number, and the ..., Mar 20, 2024 · 03-20-2024, 10:10 AM. Use a laptop computer with the Sniper EFI software. Originally Posted by Danny Cabral. EFI Software & ECU Firmware Versions: EFI SOFTWARE: Click "Help" tab (top toolbar) & "About Holley Sniper EFI". ECU FIRMWARE: Click "Sync With ECU" & "Get ECU Info" (Key-on/USB connected). , 1967 through 1969 Holley The identification number and the date of manufacture are stamped into the forward vertical surface of the air horn. The three digit date code is broken down with the first number being the year of manufacture, the second number (or letter) being the month of manufacture (1 through 0 for January through October, and then the letters A and B for November and December ..., Congratulations on finding Take advantage: up to 45% discount at Holley Girl, a once-in-a-lifetime offer. For now, you can have access to Take advantage: up to 45% discount at Holley Girl. You will save $37.9 on average in Take advantage: up to 45% discount at Holley Girl. Don't forget to check the expiration date of Coupon Codes so you don't ..., Holley Carburetors 4 digit Numeric date codes. This sample casting number from a 1970 carburetor with date code 0995 . 09 9 5. Day of the year . 099 = 99th day of the year . 1 to 365 099 5. Year . 5 =5th year. 1975, 1985 or 1995 : More then likely this carburetor was built on the 99th day of 1975 ., The Holley code tells when it was actually cast. It is common that a 1963 design has a casting date of 1968. This is the numerical listing, aka Holley part number. This is what your carburetor is. List 3793, 4118, 2143-1, 4412 pictured. Ok last/bottom line is date code. Early versions had a three digit code., D: 1970's. E: 1980's. F: 1990's. All Ford carburetors have the number '9510' in them. An example of a complete carburetor number as it might appear on a tag: D3TF-9510-CC. D means the 70's decade, 3 means 1973. In our lists, we abbreviate this number as D3TF-CC because all carbs have a '9510' number. Ford, Autolite, Motorcraft carburetor numbers., Generally, a date code in a Louis Vuitton purse is located inside the bag's pocket near the sews. To find your item's date code, first examine the inside pockets. In 80% of the bags, you'll find your date code either printed on a small leather tag inside the pocket or just stamped onto the lining., Jan 7, 2006 · On a related note, my car was started the 4th week of May, 1968 (05D) and the carb is dated 833 like chedderboys. The 4053 carbs were built in batches and I've seen several 4053's with this date stamp. Now, I'm not sure when the batch before that was built, or the batch after that, but usually, the Holley carbs are a few days to several weeks ... , Below the list number is a date code that will contain no more than four (4) digits. See Figures below. Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 . 3 ADJUSTMENT SPECIFICATIONS: MODEL 2010 List Number Choke Index Pump Cam Position Dechoke Choke Qualify 82010, 82011, 82012 No. 1 82020, 82021 Index No. 1 .300” .175”-.225 ..., Below the list number is a date code that will contain no more than four (4) digits. See Figures below. Figure 1 Figure 2 Figure 3 Figure 4 Figure 5. EXPLODED VIEW - MODEL 2010. NOMENCLATURE - MODEL 2010 Ref. No. Description Ref. No. Description 1 Choke Lever and Swivel AssemblyFast Idle Cam Plate Screw 2 3 Fast ..., 1 mpfi fuel injection system part numbers 550-903 thru 905, 550-916 thru 918 & 550-926 thru 931 handheld tuning and reference manual - 199r11761, Below the list number is a date code that will contain no more than four (4) digits. See Figure 1 below. Figure 1. DISASSEMBLY: Rest the carburetor on a repair stand to avoid …, When searching for used carburetors, note that three-digit date codes are pre-1973. Service carburetors (dealer replacements) will also be stamped with a four-digit code similar to post-1973 units, the carburetor shown above was a service unit produced in 1978. , The ANSI compliance date on the data tag indicates compliance with ANSI Z21.10.1a-1985. where 1985 is the year revision for ANSI Z21.10.1a% compliance standard. This code is typically revised every 6-8 years, which indicates two common sense considerations... 1. This water heater cannot have been manufactured prior to 1985. 2., For more information you can fill out a Technical Request form, download instruction sheets and manuals, or visit our Tech Support Library for videos and FAQ's. If you have sent an item in for repair and want to check its status, please call the respective tech line below. 1-866-464-6553., Speed-Seal and Speed-Flex. Hardline. Also in Plumbing AN Fittings and Hose. Adapters. All Hose Groups. Application Specific Parts. Catch Tanks. Fuel System Components. Hose Ends., Moving on, 0798 is our date code; Holley used a three digit up to 1973, after which they moved to the four digit code you see here. Decoding them is as follows: Three Digit - Example 763 > 7 - Year (1967) , 6 - Month (June) , …, Note different throttle-linkage and presence of GM PN, Holley list number, and date code on airhorn. Photo by eBay. Advertisement. See All 111 Photos.