I have a FiTech on a procharged gas 410 small block in my cuda. I had some issues with poor starting, over fueling, and the tech help was not much help. But the root cause of the proble was too much fuel pressure. The regulator in the FiTech is sourced from a 1.8 VW engine, it could not return enough fuel, the drivers in the computer start shutting down becausae they become overheated, trying to lift the pintels against the pressure, it sets some wierd codes that they had me chasing poor grounds and voltage supply. I kind of did a shade tree fix, by removing one of the O-rings on the stem of the regulator causing an internal leak that let it return more fuel. It works great now. Just something for you to check.