Super tuning car runs good shooting for great

Yeah it's adjust, drive repeat.

Just one point - if your advance comes in quick like you say, adding extra timing might not be what you want under certain load situations; WOT doesn't matter since vacuum drops to zero but maybe under light or normal acceleration when the RPMS are relatively low and you still have a decent vacuum signal. Obviously keep the vacuum gauge attached while doing this.

I still think 21-24" at cruise is too high. Think about it - an engine like yours is probably going to idle at 15-17" and that's with the throttle closed. The more you open the throttle, the more vacuum drops until you reach cruise rpm and the engine does not require the power to overcome inertia.

Put a vacuum gauge on both of those ports in the baseplate to see how they behave, one is for ported I think? They connect to different things.