I dont know if you guys have checked out the vids on racernine's sight but just for a little info if you have watched the mammoth mash2 vid where racernine is driving my mammoth and the wheel comes off right at the end.
That mammoth was powered by the sts.21b motor with a 12/17 cb and stock two speed trans. We would have easily won by at least two laps if the wheel thing wouldnt have happened. It totally outran everything there that night. Thats what got me hooked on sts motors I got that one off ebay for $135 and it was blowing by $300 sirio motors that night.