Me personally I have only tried looney and innovative. I like innovative because minimum smoke power and is smooth and not the on off switch. Only problem I have is xterm ex truck sounds like it has a heart beat. Going to call warren tomorrow try his out supposedly he has a fix for plugged spill port idle
Talk to Eric. He will get you running right. He has mine idling pretty smooth for what it is (305/150 conventionals) with his ficm tuning and a custom Xtreme X he wrote for it