4 corner Idle? Cool.
Nice work....I've done it before....but learned.
I daily drive a Proform main body 4777-2 650 DP....It runs flawlessly here in Oregon...3300ft.
The OE oldschool Holley DP's have pressed in downleg boosters and pressed in, non changeable Air Bleeds.
Its almost not worth messing with a Holley Double Pumper Main body and just leave the choke tower alone.
If you want more "potential" FLOW, and some more tuneablility,... scrap the main body and get a Proform.
http://www.jegs.com/i/Proform/778/67100C/10002/-1