So I got a little time in on it today. Got the Crane adjustable vac can installed and hooked up to manifold vacuum. Still running the same initial ( 12 ) and mechanicaI(24) I had before. Now at idle my advance is about 34 with the vac can hooked up and runs up to about 54 advance at about 2200 RPMs. Have not taken it for a spin yet so I can't report on any detonation issues. I'll report back later.