Thermoquad help questions

lemondana said
-midnight340- Your adapter that you show is for a Quadrajet. The Thermoquad adapter has more meat between the rear flange bolts. Hold that adapter up to the bottom of your TQ and you will see the potential for vacuum leaks on the TQ base.
Ask me how I know. Edelbrock has two different part numbers, one for a TQ and another for a QJet. Although they show the same picture for both.

I see what you mean when putting the adapter against the carb, but using the thick gasket looks like it will solve that. It covers the entire base of the carb.

rumblefish360 said
The 750 Edelbrock has a larger primary bore than the small TQ. On the larger TQ, I’d have to run calipers to find out the diameter of the venturi’s narrowest point. That’s half the equation. The double booster ring up top is the other.

Ah,I see! That makes total sense once you explain the differences in the primaries. Thanks!