Originally Posted By topside
Try allcarbs.com, AKA Allstate Carburetor. The Edelbrock kit for their Thunder series should also work, I think. That's essentially an updated AVS.
Used an Edelbrock kit for their AFB-style carbs on an AFB of mine.


I don't think the gasket for the top/bowl is the same , looking at ta thunder series it's a performer with the rear butterfly weight plate removed and a spring loaded air door added , it still has the AFB style rear venturi setup and a real AVS does not.

running up my post count some more .