Before punting..

Post back some of the specs..
Vacuum @ Idle.

The Holley is super EZ to tune but it all starts with making sure no leaks, adequate inital (12 degrees) timing, and high enough vacuum (>10 inches). Then next going inside the Holley for possible revs for the power valve, nozzles and jets. Seems like the idle speed is a little low..
But do it a step @ a time, post back and we can help you more..

Just my $0.015..