Holley Help Needed

As Loco said. You start with heavy, and work to light with the springs. A quick change kit and a metering block conversion will put a typical 3310 Holley within about $30 in price to a street avenger 670 that is a better carb and comes with the jetting and quick change cover and several springs to play with. The Avenger 670 is a close match to the oldschool 750 and would work well for you. HP books has great books on tuning a Holley...