what size carb ?

rumblefish360 said
I'm not sure about the Offy intake. At $350 (or so) I'd rather look at the Action plus by Weiand as a better part than a OE 4bbl iron intake. Being that the cam is small the OE iron will be fine.

I agree with Fishy on the T-Q. Keep it cool with the correct THICK gasket.
The pictured T-Q, IMO, would be the wrong T-Q to use. It maybe doable though. I'd try it just to see. The earlier units with a lot less vacuum hook ups is what I would look for. Also, the larger primary T-Q, not the small primary T-Q.

If the Action plus is a spread bore,then yes, use that unless your budget doesn't allow. Also, the Thermoquad you have in that pic is NOT a good one. Chunk it. It's an emmisions era carb...although technially, all of them were, that one is worthless as a performance carburetor. Also,I have been building Thermoquads almost thirty years. I have never had problems or seen problems with the plastic bodies cracking....unless it got dropped, or installed incorrectly. What I have seen regarding the plastic bodies is, they can warp from under hood engine heat. In fact, that's the reason they got a bad rap to begin with. But, in aperformance application they work well. The emissions era cars the Thermoquad came on had very high under hood temps due to catalytic converters and lean burn systems. THAT'S why so many of them warped. In performance applications, keeping things cool is important, so they rarely give problems. Also, regarding the fuel well leaking. That is a problem with the thermoquad, but easily over come. Simply use a good gasoline resistant epoxy (all of them are not) and remove the well bottoms. Clean them up REAL good. then, wipe the edges with denatured alcohol and let them air dry without touching them. Apply the epoxy to the edges of the well bottoms and the edges of the carb body, assemble and let dry. You'll not have one more problem with all that. Lastly, you can go to David's site: http://www.thermoquads.com and get and the info you need regarding tuning. he even has information there regarding the best carbs to use. They are really awesome beast carbs when they are built and tuned right. They are very hard to beat on a street or even some race applications.