Carl, I sent you a couple emails too, but for those suffering from Demon demons I'll post it here too.
To open the idle-eze turn the screw counter clockwise. But first turn it clockwise until it bottoms out. Then turn it 1.5 to 2 turns counter clockwise which should give you a decent baseline.
Another thought is your initial advance. Demons love initial advance to the tune of 18-20 degrees. I don't remember what you were doing for an ignition system, but if its an MSD distributor its as easy as running the initial up to 18 and then place the appropriate colored bushing in the distributor to limit your mechanical advance.