Run the air gap. Run Holley 600's; 1850 vacuum secondaries. You should be able to get them cheap on eBay if you know how to rebuild them with a Holley, repeat HOLLEY kit. Run the vacuum balance kit on the vacuum secondaries. Don't forget the power valves, especially if you run an automatic. Holley 'tuners' change jets all the time but ignore the power valve. Use a vacuum guage for tuning if you don't know already. Have fun with those quads. It takes alot of nerve to run them.