Ok here is where I ended up: Centrifugal advance starts at about 800rpm goes up to 15 degrees at 3000, topping out at 18 degrees. Initial 12 degrees for a total of 30 degrees mechanical advance. Vacuum advance starts at 5 inches up to 18 degrees at 13 inches. Idle speed 700rpm.
Runs good. It only rattles if I intentionally lug it down hard, not a normal operating condition. Rich/lean indicator flickers lean when cruising 40-60mph, holds steady rich cruising at 70.
Centrifugal could probably come on a bit stronger, full in at 2500 perhaps. A/F ratio could lean a bit at high speed cruise but I'm not in a hurry to fiddle with that because it's pretty close now.
I am ready for a bigger camshaft. This one (Comp252 )starts to give up over 5000rpm. I think I would like to get up to 5500-5800rpm.
Hank, The advance control knob in the cabin sounds cool. My HEI works fine, what benefit other than the remote timing control will the red boxes give over my HEI? Multiple sparks for more complete combustion? Big red boxes don't fit well with my sleeper look but if there is a performance advantage I might consider it.
