Holley carb date codes

Numbers that are preceded by '6R' or other combinations of numbers and the letter 'R' are casting numbers referring to a particular part of the carburetor and cannot be used to identify the carburetor. click on a link below for kits, floats and other parts listed by carburetor number. Holley List Numbers. R-120 to R-1324; R-1343 to R-2345; R ...

1969 Holley 4346 Carburetor 780 CFM, for 396 and 427 with GM # 3959164. 780 cfm delivers the needed fuel to give optimum response to your Chevy Big Block Camaro. Features original GM part number 3959164 Holley list number 4346. ... No date code stamping, so you can add whatever you like, if you choose; Exact size, shape, and details; Made in ...The 2 barrel carb on my Tiger has a tag # C7DF R and B 7CB with venturi diameter of 1.14″. C7DF R identifies this as a 1967 carburetor. B 7CB = design B; Production date - 7 = 1967, C = March, B = 2nd week. This is a replacement carburetor that someone installed on the engine. Stock Tiger 2 barrel carburetors as listed in the Rootes Parts ...Jun 29, 2022 · For Holley carburetors, the two most common model numbers used in both auto and truck applications come the 4150 and 4160. Step 3: Now cross-check the model number with a Holley carburetor listing. Once you have found the Holley model number on the carburetor, it is time to now cross-check this model number with an existing Holley listing. Overview Of The Holley 4150 Vacuum Secondary Carburetor. Overview of a Holley 4150 mechanical secondary carburetor, Double Pumper. Find many great new & used options and get the best deals for Core Holley 4 Barrel Carb 600 CFM List 7009-1 Date Code 1717 at the best online prices at eBay! Free shipping for many products! ... Holley Carburetors for 600. Carbing Car & Truck Steering & Suspension. Holley 4 Shoe Motors Apparel, Protection & Merchandise.Many foods contain carbohydrates (carbs), including: Many foods contain carbohydrates (carbs), including: Your body quickly turns carbohydrates into a sugar called glucose, which i...from Parry Sound Ontario Canada. 1963 8 406 Holley 4160 2652 1 C3AE-C 998. Although the build date of your carb is 1964 "probably over counter Ford replacement" I would sell it to a collector and buy a "NEW" Holley with the cash! Holley date codes that old use the first number as the year "4",second number as the month "September" and the last ... 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.

Dec 02, 2017 #1. I've got a 3310-2 with a date code of xxx4. I'm assuming 1974 or 1984, but I cannot seem to find any information on what years the "-2" version of the 3310 was in production. Does anyone know when the "-3" carb replaced the "-2"? Just curious. tuner. 2,111 70. Site Admin. Dec 02, 2017 #2.I used holley part number 20-124 installation kit to install my 4160 465 cfm carb on an Edelbrock f4b. Clearance is tight with an LAT fiberglass hood. I used modeling clay to determine the clearance. Some adjustment of the air cleaner gave about a 1/4" of clearance to the rear hood ducts. I think the original hood would not have any problem.Ford Carb Identification: Ford Motorcraft Autolite 740 1100 2100 2150 4100 4300 4350: Full Size View 1100 1101 1250 Parts Page Diagram: Full Size View 2100 2150 Parts Page 2100 Diagram 2100 Late Diagram 2150 Diagram: Full Size View 740 Parts Page Diagram: Full Size View 2700 7200 Parts Page Diagram: Full Size View ...Carb Date Numbers. The Six Pack Holley date code consists of four numbers. The carb date does not go by the Chrysler 10,000 day calendar. The first three numbers indicate the day of the year and the fourth number indicates the year. Therefore, a date code of 3649 from a 1970 carb indicates the 364th day of the year (December 24th).Holley carburetor identification numbers are typically stamped on the side of the airhorn. If the carburetor was factory issued, it may have multiple numbers, including the manufac...May 30, 2017 · Holley sells a new, 30cc metal pump arm, spring, bolt, and adjusting nut under PN 20-114 ($13.33 at Summit Racing). At some point in its life, the throttle lever came loose on the throttle shaft. Holley Performance Rebuilds our OEM/Holley DZ-302 Carburetor. One of the best kept secrets (or worst, depending on who you ask) about Timeless Muscle Magazine, is the rather vast array of classic iron project cars we have in dire need of attention to restore them to their former glory. In addition to our ’68 Firebird and ’70 Chevelle SS, we ...

The average last frost date is a crucial piece of information for gardeners, farmers, and anyone involved in outdoor activities. It helps determine the optimal time to start planti...This carb is off of a 1967 Corvette small block 350, the car ran perfectly until carb and manifold were replaced in early 1970s with an aftermarket manifold and carb, I just sold the original matching manifold a few days ago in like new condition, this carb is in perfect condition, it may have been overhauled back then, but has been off the car for close to 50 years, mounted on the original ...Holley Carburetor List 3418-1 Corvette 1969 L-88. $ 799.00. Restored Holley List 3418-1 for 1969 L-88 Corvette. This carb will be back in stock soon, please contact for completion date and date code. Out of stock. SKU: HOL-3418-1 Category: Carburetors-Restored. Description.Carb Number Carb Model Number CFM Renew Kit. Trick Kit: Needle & Seat Primary Main Jet Secondary Main Jet or plate Primary Metering Block Secondary Metering Block 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. Vintage HOLLEY CARBURETOR CARB List 7455 Date code 0548. Loft carb box 1 carb 5 Vintage HOLLEY CARBURETOR CARB List 7455 Date code 0548. Loft carb box 1 carb 5 Skip to main content. Shop by category. Shop by category. Enter your search keyword. Advanced: Daily Deals; Brand Outlet; Gift Cards ...

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Step 2. Locate the Holley model number. After determining the carburetor is a Holley, look for the code numbers, usually located on the side of the air horn. The Holley model number is present along with the auto maker part number, if factory-issued, a date and application code. Locate the lone four-digit code.Holley Carb for 1968-69 Chevrolet Camaro Z28 or a Chevrolet Chevelle, 396, 427. ... No Date code Stamped, Fuel Inlets for Original list number Carb's for a highly collectible cars. __ Goes on to say : "R4346AAS Carb..this carb. was made by Holley, The Holley Bro's Company was started in 1905 in detroit, MI. then became The Holley Carburetor Co ...No one wants to purchase food that is out of date. Although examining the food for signs of spoilage is one way to check its quality, understanding how to read food expiration date...#1 · Mar 23, 2015. A friend of mine has a Holley 3997788 6238-1. The numbers show it's a 1972 Z/28 with auto trans carb. The date code is a four digit code (1354) so it's a …About Us. Family owned since 1995, The Carburetor Doctor ships premium-quality parts daily from our Tulsa, OK warehouse to customers worldwide. Read more...

carburetor bowl hdl-ley on models aai and 2110 number is stamped on tag. on model 852 number appears on plate mounted on air horn body. (on new units the number is stamped on float bowl. ) model 4000 list number stamped on throttle body flange model 1901 list number stamped on throttle body flange model 1920 list number stamped on carburetor bodyBuy 1969 Holley Carburetor, 396ci, 780 CFM for only $1,014.99 in our huge selection of parts. Shop restoration car parts and accessories at Rick's Camaro. ... including GM part# and Holley list#. NOService replacement date code. Carbs are not eligible for Volume Discount. The store will not work correctly in the case when cookies are disabled ...General Q & A - holley 750 marine carb # R84018 Date code 2048 - (# R84018 Date code 2048 ) Is a this junk carb?? Does not look like a standard holley. We rebuild mine and still have problems. It pops and backfires in the mid-range. Vacum at idle is only 10-15 psi. Is vacum a problem? Is the power valve the problem?Find many great new & used options and get the best deals for HOLLEY MOTORCRAFT D9TE-9510-AEA Holley Carb. LIST 8343 Date: 0369 at the best online prices at eBay! Free shipping for many products! ... Delivery *Estimated delivery dates include seller's handling time, origin ZIP Code, destination ZIP Code and time of acceptance and will depend on ...Carburetor Reference Guide - MyMopar. 1963-1974 Carburetor Reference Guide. Carburetor Number. Carburetor Type. Application. 1963. 3236. C-1. 170 / 225 Taxi.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 R4555 LIST 4555 and used on 70 LT1 780 cfm . Check here for specific Muscle car Info. Referenced by ; Holley R4555 or LIST 4555.Find many great new & used options and get the best deals for Holley Carburetor List 3113 C4AF9510-EH Date Code 465 Ford at the best online prices at eBay! Free shipping for many products!Original list number stamped with current date code; No choke for unobstructed airflow on 500 cfm outboard carbs; Remote choke for easy hook up original vehicle on 350 cfm center carb; Factory style metal throttle linkage; All OE vacuum hook-ups; 100-percent wet-flow tested by Holley technicians to assure it arrives ready to run

Realistically, a slightly larger 650 to 700 cfm carburetor would be a good choice. To take another example, let's use a 302ci small-block Ford and apply the same equation also using 6000 rpm as the peak. This produces 524 cfm for 100 percent VE and 470 cfm as a 90 percent VE cfm value.

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.Date codesMax power for holley 12-1800 Holley carburetor 3139-1 4 bbl 3874898 er date code 1903 chevelle 396Holley 3139-1 carburetor 3874898 -er ..date code 142. Vitamins without iron, healthy snacks for weight loss, holley carb cfmHolley 3140 1 4 bbl 3868864 es date code 594 Holley 2300, 2300g, 2300mg exploded diagramsPhscollectorcarworld ...The dual quad carbs were 4000's, as was the carb for the F engines. Not 4150's. Paul's quite correct with these numbers. The 1272/1273 were the first generation 4150. Holley later produced a 465cfm alternative (ref 1848) which was supposed to be a big improvement and retained the heat control choke. Decoding Ford Carburetor date codes . Autolite carburetor use a 3 or 4 digit date code system. Starts with the year on left, a letter in the middle for the month and a 1 or 2 digit number on the right depicting the day of manufacture. this tag is typical of an Autolite 4300 carburetor, C8ZF-A with date code 8B13. 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.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 .25548 posts · Joined 1998. #4 · Apr 5, 2005. I think that 3837 is a regular 780 divorced choke Holley, similar to what GM used on the rest of their performance engines. Tom Terrific or Terrible Tom, depending on the phase of the moon, passing cosmic rays or other factors not fully understood except by my wife. Like.

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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. Air & Fuel Delivery/. Carburetor Components. Carburetor Parts And Components. Holley offers a wide variety of replacement and performance enhancing components for your Carburetor. From replacement fuel bowls to power valves and jets and everything thing in between.183 posts · Joined 2007. #2 · Dec 11, 2008. 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. The LIST-3418 carb, NO suffix, is the came carb, listed for 1966 Corvette 427/425 only, probably the …It originally came on a 1965 Z16 Chevelle. It was made the first week of May in 1970. A foreign car bought is an American job lost! Correct, this is for a used Holley carburetor List 3310. It has the GM part number on it of 3878261 EH which is correct for the 1965 Chevelle Z-16 with the 396 engine. However the date code on the carb is 051 which ...Mar 14, 2018 ... just an idea on how a 3310 or 3310-1 holley is nothing like a 3310-2 through 3310-11.HOLLEY 4557 CARB 983 DATE 1969 1970 454 LS6 396 L78 CHEVELLE 396 L78 CAMARO NOVA IT LOOKS PRETTY GOOD MAY OF BEEN REBUILT BEFORE. ... Notes - Delivery *Estimated delivery dates include seller's handling time, origin ZIP Code, destination ZIP Code and time of acceptance and will depend on shipping service selected and receipt of cleared payment ...Oct 25, 2013 · 1967 Holley 3916143 CT Stamping Date code "742" (2nd week of April, 1967) 1968 Holley 3923289 DZ Stamping Date code "833" (3rd week of March, 1968) 1969 Holley 3959164 GE Stamping Date code "935" (5th week of March, 1969) 1702 posts · Joined 2006. #1 · Feb 28, 2009. Have a guy trying to sell me an original Holley DZ carb but I'm not sure the date code is correct. Here are all the numbers on the choke horn: 3923289-DZ. LIST-4053. 0523. Correct or service replacement? '74 with roller 454, TH400 3K stall and Ferd 9 w/ 4.20s".4478 posts · Joined 2000. #2 · Apr 6, 2009. 3 digits are common Jeff as my 1969 Holley 4346 has a date code of 924 which represents (9)1969, (2)February, (4)4th week. To be honest I don't know if the 1965 carbs were coded the same as the 1969's. One might think it could be a 1970 carb from the fourth week of May (if you followed the same ... ….

carb date codes. Jump to Latest Follow 1 - 3 of 3 Posts. M. musstangr · Registered. Joined Aug 18, 2006 · 24 Posts. Discussion Starter ...Should be a 3 digit date code if 69. I believe dates on Holley carbs were 3-digits up into the early 70s (1973 I think), and 4 digits after that. ... Service parts will have four digit date codes." 1969 04A Van Nuys-built Z/28. Cortez Silver with dark blue interior and VE3. Sold Clippinger Chevrolet. Raced at Lions in LA.Expire Date Holley Promo Codes & Deals April 2024 - Up To 10% Off: 10% OFF: 14 Dec: Great Offer for Holley: 10% ~30% Off: 30% OFF: 05 Mar: 10-30% Off Holley Products + Free P&P: 30% OFF: ... As for carburetors, Holley sells several items to compliment the part such as rebuild kits, pump springs, fuel logs, and linkages. Holley Performance ...The top of the stamp shows the GM part number 3886101E1, the midportion is the Holley list number, 3247. The DATE CODE which you are asking about is the bottom area, on mine it is 612. If yours has a 4 digit stamp there, it is not original, it is a service replacement built later. The 3 digit code as in my 1966 Holley identifies 6 (the year ...1957 Ford Thunderbird Holley 4160 Carburetor *Remanufactured. SKU: 43-236N. $749.95. Core. Core Deposit ($350.00) Out of Stock.How to Become an Expert on EFI and Carbs: Holley Training. Dave Bellm. 01/05/2024. news. news Holley Training Class efi. Holley EFI Training: Don't Miss the Final 2023 Classes! David Bellm. 11/03/2023. ... Join the Holley Family. Stay up to date with the latest releases, events, promotions and more. Sign Up.The format is as follows:YDDDWhere: Y is the last digit of the year. DDD is the day of the year (001 to 365) Decode the year: The last digit of the date code represents the year. For example, if the last digit is "3," the carburetor could have been produced in 1973, 1983, 1993, or 2003. You may need to consider other factors, such as the ...Find many great new & used options and get the best deals for Holley L-7455 450 CFM Quadrajet Carburetor Date Code 0117 at the best online prices at eBay! Free shipping for many products!Holley carburetor identification numbers are typically stamped on the side of the airhorn. If the carburetor was factory issued, it may have multiple numbers, including the manufac... Holley carb date codes, Carb date decode. Jump to Latest ... The four digit date codes came in about 1973. Holley has changed their part numbering system at least twice since 1969. The 91, 01, s/r metering blocks usually have two seperate #s stamped on each metering block while the 69 part would have only the numbers 5583 and 4519 stamped on the primary and secondary ..., Holley Performance Products warrants its new Holley, Flowtech, Hooker, NOS, and Weiand products to be free from defects in material and workmanship for a period of 90 days from date of purchase. Holley Performance Products Limited Warranty specifically does not apply to products, which have been (a) modified or altered in any way; (b) subjected, Find many great new & used options and get the best deals for HOLLEY Double Pumper 4BBL CARB R84024-1 Date Code 1693 650 CFM Parts or Rebuild at the best online prices at eBay! Free shipping for many products!, 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 ., Holley List 3124 GM #3868826-cs Date Code 961 L78 19651/2 425hp 396 Corvette. About this product. About this product. Product Identifiers. Brand. Holley. Manufacturer Part Number. ... item 3 1965 CORVETTE 396 425 HP 3124 HOLLEY CARB WITH PEANUT BOWLS (5B2)SHOW RESTORED 1965 CORVETTE 396 425 HP 3124 HOLLEY CARB WITH PEANUT BOWLS (5B2)SHOW ..., 3310=common Holley replacement carb. -1 indicates a revised carb, the date code is probably 1983. This would be sold at like summit or jegs, not a GM replacement type deal. Authentication and pre-purchase inspection service still available. PM me for more information. :thumbsup: Still looking for that elusive 76 Nova SS., A 1967 440 Carter AFB carb with the date code of H6 indicates August 1966. In later years, like the 1974 440 Thermo-Quad carburetor, five numbers were used. The first three was the build day and the last two the year. A 1974 440 Carter carb (6460S) with a date code of 21173 indicates the 211th day of 1973., There seems to be a protein stand-in for nearly every type of carby vehicle you can think of. I am not on a no-carb, or even low-carb diet, but I am on a eat-as-much-protein-as-I-c..., These units showed up on thousands of Slant-Six Mopar vehicles, but they are a temperamental, leak-prone carburetor that I avoid., 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), Holley Carburetor Identification Codes. ENGINE . HP, ZLP955. 3654 posts · Joined 2011. #3 · May 19, 2014. ^^ x2. CRG's Carb page states "Service parts assembled 1973 or later will have four digit date codes" for Holley carbs, so it could be 73, 83 etc as Jon said. 1969 04A Van Nuys-built Z/28. Cortez Silver with dark blue interior and VE3. Sold Clippinger Chevrolet. Raced at Lions in LA., 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, 5th week..., Mar 7, 2009 · 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 . , A friend of mine purchased this Holley carb which has the following numbers: C9AF-9510-J LIST 4609 It's supposed to be for a 428, but was curious exactly what it may have came on originally. ... 1966 T-Code Coupe (1st Car, Sold), 1967 GT 350 4-Speed w/original Paxton SC (Sold), 1970 Boss 302, 4-Speed (Sold), 1969 GT S-Code Convertible ..., A quick glance shows this is a 427 425 HP 4 barrel Holley. It should have a date code below the 3418-1, that will help determine if it's an original, or a service replacement, that will help determine what it's worth. ... I Have a HOLLEY CARBURETOR 830-855CFM? # 3886091-AN Scribed on the Airhorn is: List 3418-1 703 stamped just under the above ..., Therefore, a date code of 3619 from a 1970 440 Holley carb indicates the 361st day of the year (December 21st). The 9 indicates the year 1969 (December 21, 1969). A 1972 440 HP Holley 6160A carburetor with a date code of 2031. This would indicate July 22, 1971. Other Mopar Engine Carb Number Articles: 440 Six Carb Numbers and …, 69 DZ Carb Date Code. « on: April 25, 2011, 07:00:34 AM ». hello all, I'm new to the discussion group and I'm also in the process of purchasing a 69 Z, so I'm trying to decode authenticity the numbers for the car. Looking at the three digit code it seems this is a 68 year model carb, would I be correct? Carb data below: 3923289-DZ. List 4053 ..., So who knows if your carb is correct for the applications you say it is it could possibly go for a lots of $ considering it's just a 40 yr old holley 4 barrel carb for rbld/resto. Scott. SCOTT. 1969 CHEVELLE SS396,ORIGINAL #'S MATCH,GOT IN 1978, (In 2001 rblt/bored original 396 .030 to 402)/M20/12BOLT/3:31'S., When I picked the car up, Howard asked me to read him that date code after we verified the Ford # under the tag. Mike., This is for a Used Original Big Block Chevrolet Chevelle Holley Square Bore Carb Body Only, (GM Part Number 3874898 ER, GM Group Number 3.725, Holley Part Number 3139-1), Correct for 1965 and 1966 with 396 325 HP and 427 CID Engines. THIS IS FOR PARTS ONLY, THIS IS NOT A COMPLETE CARB! It has a date code of 623, (third week of February 1966)., HOLLEY CARBURETOR LIST 3810 1967 CAMARO CORVETTE Date Code 6B1. 1966 Dec. 1st week GM #3906631-DA This is a rare find for an early 1967 Production car. This is completely restored to all original specs, color and plating. It will be run on a live test motor before it leaves our facility to ensure that you will have a trouble free installation., Holley 0-80457S 600 CFM Street Warrior Carburetor. $312.00. Trending at $369.99. Find many great new & used options and get the best deals for 1972 Corvette Lt1 Holley 3999263 List 6239 Dated Dec 1971 at the best online prices at eBay! Free shipping for many products!, 450-LS6 (w/L89) Manual M22. Aluminum Heads/Heavy Duty Clutch. (1) There is some discussion about the 454 being sold with aluminum heads. One very respected source says that according to records at Tonawanda, no 454 engines came with aluminum heads. Their records indicate the L89 option was cancelled (not replaced) with the demise of the L78/L89 ..., This whole search started when I tried to identify a Holley 2300 2V carb sporting a LIST - 8641. I can tell by some of it's features that it was an OEM carb on something, just trying to positively identify it. It's got a 1342 date code so I'm guessing it's the 134th day of 1962 or 1972. If anybody has a link to the 2300 LIST numbers index I'd ..., 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 H4-4160 . This carburetor has a part number of 1850-4 and used on 600 CFM . Check here for specific Muscle car Info: Referenced by ; Holley 1850-4 ..., This carburetor was made by Holley , The Holley Brothers Company was started in 1905 in Detroit Michigan then became the Holley Carburetor Co . ... This carburetor has a part number of R3837 LIST 3837 and used on 66-67 Chevy 3/8 tube in base . Check here for specific Muscle car Info: Referenced by ; Holley R3837 or LIST 3837 This Site Designed ..., Expire Date Holley Promo Codes & Deals April 2024 - Up To 10% Off: 10% OFF: 14 Dec: Great Offer for Holley: 10% ~30% Off: 30% OFF: 05 Mar: 10-30% Off Holley Products + Free P&P: 30% OFF: ... As for carburetors, Holley sells several items to compliment the part such as rebuild kits, pump springs, fuel logs, and linkages. Holley Performance ..., F. FOXBROSRACING. 201 posts · Joined 2010. #2 · Feb 21, 2013. as close as 3 weeks to build date, as far as 6 months before. holley built there carbs in batches. This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread., 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). 1969 04A Van Nuys-built Z/28., Carb Date Numbers. The Six Pack Holley date code consists of four numbers. The carb date does not go by the Chrysler 10,000 day calendar. The first three numbers indicate the day of the year and the fourth number indicates the year. Therefore, a date code of 3649 from a 1970 carb indicates the 364th day of the year (December 24th)., C1 & C2 Corvettes - Holley 3810 date codes????? - I have two Holley carbs. both numbered 3906631-DA list 3810. But the date codes are 943 and 984. I checked all of my books and only the 67 corvette is listed using this number, does anyone have info. on other Chevrolet applications using these numbers?., Jul 24, 2010 ... I want to look for an early model holley 4150, that would would have come on a 57 T-Bird. Does anyone know what the list number and date codes ...