Small Block Distributor Recommendation

Run what you have and work on your tune up.

Once you go past a very mild stocker the vacuum advance becomes more of a pain in the *** than anything else.

Most likely, when you get enough total on it, then add vacuum advance, even if it's hooked to manifold vacuum it's likely you will have ping on tip in and never get rid of it. The vacuum advance comes off too slow.

So, you pull total out and you end up with about the same total or just a bit more than if you skipped the vacuum advance all together.

I'm working on a dead stock Pontiac 400 with Vacuum advance. Hooked to manifold vacuum, when the total gets up where it needs to be, guess what? Tip in rattle.

When I find him the distributor I want hi to use, it won't have the vacuum advance and I'll only lose about 8 degrees of advance without the vacuum.