i had the passion racing 12 port job done by jim and that thing will fly. the set up i have wus the the 12 port job,cool head,with 19 cc domes on racing gas,35mm pwk,pancake bearing,rdz inframe drag pipes,10 over swingarm,jr dragster m/t slick and a few more things. and i wuz in the ball game buddy. you cant go wrong when you deal with jim at passion racing. i recent just got a 4mil 421 built on alcohol and i can wait to c how this thing gonna run