My Combo, Manifold Or Ported VAC Advance, We'll See...

I'm always at the end of my budget. LOL

Some here will say if your build wants manifold vacuum, it's a bad or poor build. I don't necessarily share that sentiment. Although it's certainly possible it can be a crutch for a non optimal build, I like to think of it as "just doing it a different way". Both my vehicles for example, ran fine with either ported or manifold vacuum. Both of them "just happen" to run a little better on manifold vacuum. I wouldn't call it night and day, but it's a noticeable difference. Enough that they are staying with manifold vacuum.

The big block Chevelles used manifold vacuum on the distributor all the way to 71 and maybe 72. Were they "bad builds"? 3700 pound cars that could run low 14s and high 13s from the factory? I'd hardly call that "bad".