Off the top of my head I can't advise on specific fuel pumps for a Holley 750 however any high volume low pressure 5>6lbs pump should work fine.
Something else just came to mind about your problem, bit of a long shot but worth looking at... Have you checked the one way valves on the firewall to be sure ones not backwards? Happened to us once and caused cross feeding on one side and no fuel flow on the other, took a while to find that one
PS: We have new original Faucet Pumps in stock. It will bolt right up.