[bober]

I ran into a collection of various dual quad set ups w/carbs and not sure how to ID them or even how many may be Pontiac . It's hard to get to them and get #'s obvious that some need to be rebuilt but a couple are wrapped as if new or had been rebuilt . How many actual Pont. duals are out there ? I'm assuming they're all older parts . Alot of this stuff is Pont or possibly Chevy . I knw the Chevy would have the dist hole in rear and stat in front and Pontiac is just water in frt. Thanks for any help.

[tom s]

Factory 2-4s would have been like a pair of 3010 AFBs for 1961 ,62-63 were the same basic carbs but the rear had a man choke and and front had no choke number 3433 and 3435.Those numbers are not stamped on the carbs anywhere only a little alu tag attached by a screw on the top.The throttle arms are unique and are not found on ANY other carbs except pontiac SD AFB carbs.Tom

[carbking]

Perhaps this listing of intake manifold casting numbers might help:

https://www.thecarburetorshop.com/Mu...bmanifolds.htm

The 1956 Pontiac dual quads were Rochesters, on a cast iron intake. In 1957, Carter built 12 sets of WCFB carbs for Pontiac for experimental purposes (they used the 1956 intakes), but these are exceptionally scarce; I have only seen one set in 60 years.

As Tom stated, the SD carbs (1961, 1962, 1963) had no stamped number (actually, they did, the choke butterfly housing was stamped with black ink, guess how long that lasted) because they were what Carter called low production. As such, none of the SD carbs (other than the 3-barrel) had their own castings. They were built from other carbs; both Chevrolet and Chrysler carbs were used as donors to be reconstructed as Pontiac. The SD AFB's were literally hand-made when an order was received. They pulled the donor carbs off the shelf, ground off the numbers, and modified them to Pontiac specifications.

And as Tom also mentioned, the SD Pontiac primary throttle arms are unique. Once you have seen one, you will not mistake any others for the Pontiac.

The Chevy small block used Carter WCFB carbs; the later 409 used AFB carbs that are stamped on the edge of the mounting flange.

The manifold guide may be your answer.

Jon.

[bober]

Thanks all! I'll try to see if I can get close enough to get a # .Or #'s . Probably not a lot of call for any of these anymore ?