Got another question. I have a pair of seats for the "Z" that will accept a 5 point harness. They also have adjustable rails. Can I use those adjustable rails if they are mounted to the frame/cage per SFI specs. or do the seats have to be mounted solid directly to the frame/chassis? I'd like the seats to be adjustable but only if it will pass tech. Neither the NHRA rule book or SFI says anything about adjustable rails one way or the other, the way I read it, but I'd like to be sure before I install the seats. They just say seats must be bolted down with 4 bolts and a seat back bracket to the rear cage tube. Thanks agian for the help.