I ran a fresh TNT Mods OS .18TZ www.tntmods.com , a Hyper7 38mm flywheel (thanks Lance!), Ofna aluminum shoes w/1.0 springs, a Racers Edge 17t narrow clutch bell, and a 38t spur. I locked the truck in first gear so it was a single speed. P1's w/40 wt, white/green springs, 30k diff lube, Pythons on Hurricanes