Hi Rock and Eric, thanks for getting back to me. Here's what I have : The motor makes 609 h.p. on the dyno and the NOS kit is at 250 h.p. which I hardly use. But at the track I have my fuel pressure set at 7-8 and by the 1000 ft. mark its dropping to ONLY 1 !! I currently run a mallory 140 ( dead-he...