Hi Stangnet... I'm from St. Louis and have a Procharged Mach 1 with a Cobra short block. Only making 486 rwhp, 466 rwtq because the P1SC runs out of steam. It used to be running on the original Mach block at 450 rwhp, but I spun a rod bearing. Probably going to go D1SC this summer and see what...