Thanks, Denny. I'll mess around with it today and see if I can't find that sweet spot. Should I try any adjustments on the throttle screw or play with them both or get the rpms down close with one screw and the take over and do the fine tuning with the other? As far as engine mods go, it has and HEI in it and the cylinders were bored 30 over (I don't know if that counts as a modification though).