Carb ID
Race Director
Joined: Oct 2000
Posts: 12,703
Likes: 3,153
From: Shamong, NJ
I answered your post in the C1/C2 section, but I'll answer here too, for those that don't recognize the carb.
That's a Rochester 4GC. They were used on some GM cars from around 57 till about 63. Originally it would have had either a brass or aluminum tag to identify it, under one of the top plate screws. Some 4GC's had 4 or 5 numbers stamped in the air horn, which would have been the same as the last numbers of the part number on the tag.
That's a Rochester 4GC. They were used on some GM cars from around 57 till about 63. Originally it would have had either a brass or aluminum tag to identify it, under one of the top plate screws. Some 4GC's had 4 or 5 numbers stamped in the air horn, which would have been the same as the last numbers of the part number on the tag.
Tech Contributor
Joined: Aug 1999
Posts: 14,384
Likes: 6,408
From: At my Bar drinking and wrenching in Lafayette Colorado
That's correct. The 4GC was also popularly known as the "4-Jet," not to be confused with a "QuadraJet." It was used on full-sized Chevy's with 327's and 409's, as well as on the 283 Chevelle, Chevy II and full-size up through 1966. In 1965, the Q-Jet became the standard carb on the new 396 big block, and on the 427 in 1966. 1966 was also the first year for the Q-Jet on the 327 as the 4GC 4-Jet and the Carter AFB were phased out of production. The Vettes used the Holley carb in the 1965/67 transition period from Carter AFB to Q-Jet.
Lars
Last edited by lars; May 2, 2022 at 08:12 PM.
