Can someone provide the correct AFB Carb number(s) for an early ('62, '63, '64) 327 cu in , 300 hp engine? Thanks!
-
-
Re: Correct AFB Carb Number
Mike -
There are eight different AFB's across those years, depending on engine and transmission combination; which one are you after? -
Re: Correct AFB Carb Number
In particular, a 1962 with manual transmission. I am not that fussy as it is a "driver", so any period correct carb for a manual tranny with a 300 hp design target would be ok. My engine was "souped up" beyond good manners before I purchased it. I am planning on putting in a smaller cam and bringing the engine back close to stock look with the correct CI manifold and aluminum air cleaner. It presently has an Edelbrock performer manifold with a 750 cfm Holley that runs chronically rich. The idle mostly due to the cam is terrible. Please note that the replacement carb must have the smaller 4-1/8" throat to accomodate the original air cleaner. Thanks.Comment
-
Re: Correct AFB Carb Number
Mike -
The Spec Guide says a '62 300hp manual took a #3269S; the JG may have more detail.Comment
-
Re: Correct AFB Carb Number
The correct 62 carb is Carter 3269S and was used on both the 300hp and the 340hp with a manual trans.Comment
-
Re: Correct AFB Carb Number
The 3269S evolved to the 3461S (3260S for PG) in '63 and then to the 3721S/SA/SB (3720S/SA/SB for PG) by late '64. The "SB" versions of these carbs were sold by GM and the aftermarket well into the seventies, so they are relatively plentiful compared to originals from '63 and especially '62.
The big change from '62 to '63 was a provision for a PCV inlet on the back side the the carb. I'm not sure if the 3269S had this, but if so it probably has a plug.
Not sure of the difference between the PG and manual trans carbs, but I think it's in the throttle lever as I recall the internal calibrations are the same between each model "20" and "21".
DukeComment
-
Re: Correct AFB Carb Number
The right carb is a Carter AFB 3269S. Will cost you about $600 or more restored. You may find a crummy one you can restore yourself for $400+. They're dated, so you'll need to decide what you think about that.
The Carter AFB 3721S/SA/SB was the universal replacement carb for 62-65 Corvettes. They'll bolt right up. There's lots of them on EBay for around $100. Won't be correct. Won't have the right date. But it'll look very close to the 3269S and be its exact functional replacement.
As you mentioned, you'll need a 62-65 Carter AFB if you want to use the original air cleaner with the 4 1/8" neck. With one of these carbs, the correct choke and the correct fuel line will also bolt right up. I love it when that happens!
Also note that the Carter AFB carbs for 62-65 Corvettes have a unique bolt pattern to the intake manifold. You'll need an intake from these years to mate with those carbs. The '62 300 HP (cast iron) intake manifold is regularly available on EBay for around $100. They're dated. The '62 340 HP (aluminum) intake manifold goes for well over $400 on EBay, and they're crummy. The aluminum usually is in bad shape from corrosion and poor welding to fix breaks. They're fragile. Don't know much about 63-65 Corvette intake manifolds.
You can easily swap the top (air horn) section of an EBay 3721 onto a modern Edelbrock AFB. The modern Edelbrock AFB will fit Holley bolt pattern intake manifolds. The top section of the 3721 will allow you to use the original air cleaner, fuel inlet, and choke. That's what I did. Works like a charm.Comment
-
Re: Correct AFB Carb Number
That swapping idea is a great one. I'll keep it in mind while hunting at ebay or Carlisle this year. I have a 300 hp cast iron manifold #3749349 that is correct and should line right up on the bolt pattern. For Christmas I am buying myself a retro 300 hp cam and lifters and taking out a too large Comp Cams 280H. A lousy idle and too much power do not go well with a car with four wheel drum brakes and a straight axle suspension. Thanks for all of the info.Comment
Comment