I autocrossed my 240 for several years with the original r180(in the forward position no less)with around 300hp.It got real noisy about 5 years later but never broke(bearings I guess).I avoided smokey stoplight burnouts but it did get its share of them on the occasional saturday night.If you keep it off the drag strip,and away from wrinkle wall slicks,it should be fine.Good Luck!