A properly built BTR with a stally and over 350rwkw's is enuff to munch a 6spd Auto with over 380rwkw from takeoff and roll-ons, (Thanks for the experience Tarso), and certainly munch a 2 speed glide from roll-ons for that matter, also thx to Justin. On a serious note, My BTR has lasted me just under 2 years of total rape and it still feels as good as new. It obviously wont last as a power-glide would but if it was to crap it self, id simply go back to Bayswater Autos and get it rebuilt.... As ppl have said again and again, if these boxes are built properly and tuned accordingly they are the works but then again every box has it's pros and cons.... 4 Speed FTW