Timing by Vacuum Reading?

So it's running 'extremely well' while running rough?
You need to get the idle timing sorted. That is the starting point. The above test does that. You are confusing idle timing with WOT timing needs.

Why you should use vac adv? Read about it here, last few lines are the most important. Scroll down to post #6.

www.hotrodders.com/forum/vacuum-advance-hooked-up-directly-manifold-bad-47495.html