Jay and I have been discussing the Rochester 2GC options using an adapter on the Monojet intakes. What we've found to be available:


Base (bores) - Venturi - CFM 2bbl (4bbl equivalent)
1.25" (1-7/16") - 1-3/32" - 278cfm (197cfm)
1.25" (1-7/16") - 1-7/32" - 311cfm (220cfm)
1.5" (1-11/16") - 1-3/32" - 278cfm (197cfm)
1.5" (1-11/16") - 1-3/16" - 352cfm (249cfm)
1.5" (1-11/16") - 1-1/4" - 381cfm (269cfm)
1.5" (1-11/16") - 1-5/16" - 423cfm (299cfm)
1.5" (1-11/16") - 1-3/8" 435cfm (308cfm)

The largest one, used on big blocks, seems to be available for around $94 as new part quite readily on eBay. But the 381cfm one, used on the L65 Chevy 350, is much harder to find as a new carb.

The 278cfm seemed to be available with either a top that fit the 2-5/8" air cleaner base, or the 3" air cleaner base of the other large base 2GCs.

Last edited by Lifeguard; 03/15/17 05:27 AM.