Need advice on Holley carb.

I have a 0.030 over 340, 10.5:1 compression, Edelbrock air gap intake, headers, big valve "J" heads with mild port work with a .513/.533 lift, 234/242 duration @ 0.050 Lunati Voodoo camshaft, backed by an A833 four speed and 4:10 8.75 Sure Grip. Topping it off is a Holley 750 double pumper with the HP center section and new baseplate. Looking for jetting advice. At the moment I have .72 main and .82 secondary, 28 main air bleeds and 57 idle air bleeds. I believe this carb was on a big block before I got it. It runs out good, but has always had a rich idle, only pulls about 9 inches of vacuum at idle, and I'm only about 10 degrees BTDC initial. I know it wants more timing. Can someone with a similar setup give me a good starting point on jetting, air bleeds and timing?