I just put the Atomic 2 on my SBC 350. It seems very similar to the Sniper that many are familiar with. I have a very strange problem. I started it for the 1st time a few days ago. It seemed fine at first so I let it warm up. I noticed after warm up the engine was idling around 1300-1400 RPM. I turned the idle screw down. This is the part that's bothering me. I can't turn the idle screw out anymore and the IAC reads 0. The car idles around 800 RPM. I set the idle to be at 650 RPM. Do I have a giant vacuum leak? Could it be something else? Maybe I didn't tighten the throttle body enough? This engine was in tip-top shape when I had a Double Pumper on it.