Base Timing Questions

I hear you loud and clear I can’t count how many threads I have read where you said “you’re right foot controls the mileage” lol.
I am only considering a vacuum advance to improve idle quality and overall drivability. So in that light does your opinion change at all? I know tuning will be a pain in the *** to try and accomplish what I’m trying to do. And I’m definitely not saying you’re wrong. I’m just trying to understand whether it’s worth moving in that direction.

It depends on whether the engine wants MVA or not. I don't think tuning will be that hard, vacuum advance is the kind of thing that's best dialed in with driving. However the idle vacuum will be much lower than cruise so it may be a case where using MVA doesn't give much advance at idle unless the can is adjusted very "loose" (brings in advance at low vacuum) which may make it ping during cruise.