Carb is done (well I do need to drop 1 jet size but she's really close and that'll take just about 30 minutes including pulling and re-installing the carb...). Now it's time to fine tune the distributor.

I'm only about 6 degrees advanced at idle. When I'm cruising along and give it about 3/4 throttle I get pinging. I don't have a tach but I'd guess it to be about 2,500 to 3,500 RPM's when it happens. If I floor it the pinging goes away. Also getting some dieseling when it's hot.

Basically I think I'm getting too much vac advance. How would I fix that? If I can bring the vac advance down a bit I can increase initial advance a couple points and smooth things out some.

I have one of these: http://www.ebay.com/itm/New-Chevy-Inline...e5a&vxp=mtr

(not the best, I know...)

Thoughts? I've never done this or even seen it done so a little hand holding would be appreciated.