when i got my car as a roller it had a broken axle, guy had a mild big block in the car, i put a new axle in, had a auburn posi with a richmond 4.10, 4500 stall more mild small block 360 mabe 410ish horse, th-350 on 28x10.5s and never had a problem, but in my head i knew i was runnin on borrowd time