Is there a specific gasket I would need to mate a Pontiac Qjet to a TA manifold on my 71 Buick 350? If so which kind and part number should I be looking for? I believe the rebuilt carb is a 73 model which was used to add an electric choke set up. In another post a member mentioned that there were different gaskets and using the wrong one might cause a vacuum leak.
Just about any gasket available for the Quadrajet will seal it up on most intakes. The only exceptions would be the early 65-67 gaskets that were used by GM to seal up quadrajets on intakes that used exhaust crossover "channels" under the carb. We stock all the gaskets currently available for under the Quadrajet, and several custom made ones. I would recomend using our 1/4" thick gasket. It is a very well made part, and will help to keep some heat off the carburetors. Lots of folks by several of them and stack them together to make a 1/2" spacer and protect this new fuel from the heat of the engine so it doesn't evaporate away so quickly. They are a 4 hole design, and easily modified with a pair of tip snips for aftermarket divided intake manifolds.......Cliff
Thanks Cliff, Just got your book. Now I need to make the time to read it. Quick browse taken and its looks informative!
I agree with Cliff, using (2) 1/4" thick flange gaskets is the way to go. Not only does this help keep the carb isolated from the hot intake manifold, it also increases plenum volume allowing for the A/F mixture to more easily negotiate the sudden 90 degree turn into the runners.
Stock cam or aftermarket? Ignition timing plays a BIG role in vacuum at idle as well. Carburetor too lean, plugged up idle tubes, etc will also cause low vacuum at idle speed, and really "stinky" exhaust......Cliff
1971 Buick 350 with TA 284 cam, TA Stage 1 manifold and rebuilt Pontiac Rochester 4bbl Qjet with electric choke set up that I believe is a 1974 model. Serial 7044266 / G3 - MP
