Vacuum advance needed for cam break in?

RustyRatRod said
I never worry about "where" the vacuum can pulls timing. I just hook it all up and go. I've seen Rob (@crackedback ) say it time and again and it's the same way I do it. Soon as the engine busts off, run it up to "about" 3K "or so", grab the timing light and pull in about 35 "or so" degrees of timing. Break it in like that and you'll not have a problem.

35 is pretty slow no load.

I also time the distributor while it's on the stand. If I want 40 or 45 or whatever I'm usually within a degree or two of that when it fires.

Never drop the distributor in timed at TDC. They sort hard and again, slow timing kills parts.