I'd like to see PS go to roughly PST displacement (350-ish), allow EFI, and be considerably more strict as to body dimensions. You could have actual over-the-counter blocks and heads being used in everything from small-block pushrod and / or modular Ford, Chrysler Hemi, and GM LS1 motors in cars that actually resemble what you see on the street. Heck I wouldn't mind limiting the chassis to back-half cars only, in fact I think that would be awesome!