I ran a P1 on my Mach 1 to mid 10's using a 2.9''. Contrary to popular belief the P1 can make some decent power. With my F1A 3.8 or 4.0 (cant remember) I ran low 10's high 9's, 138ish. Full weight car with DR's. The principal problem with the Mach's setup is the 6 rib serp. belt. I used reichard...