Base Timing Questions

OK, I’ve read some of crackedback previous threads on this. Seems like he’s more concerned about power than drivability. I could be wrong and don’t want to speak for him. But I understand his point that you can probably make a mechanical secondary work just as well as a vacuum, secondary with tuning and I won’t argue that. The question is am I capable of all tuning and would vacuum secondary be, more useful to me with my application.

For me, I’m trying to make the best of what I have. And what I have is not ideal at all. I have an automatic with an engine that was really designed for a four-speed racecar. And I’m trying to tame it. The engine has a 12 to 1 compression ratio And I do not have the cam specs. I’ve gotten this to run before and it was fair. What I’m trying to do is to get it to run better. I am willing to sacrifice 25% power for drivability if need be, I have on hand a vacuum secondary carburetor , i can get my buy a vacuum advance distributor to work with my MSD 6AL. But for now I’m just trying to make what I have work better. And learn as much as I can from you guys thanks, Ron.

Drivability is in the tune whether it's a vac or mech secondary carb. If you can't tune one style, you can't tune the other.
Mileage, your right foot controls that. Stand on it all the time, mileage suffers. The primaries on the carb don't care how the secondaries open and in both cases your right foot controls that.