Hp dont break parts. Torque breaks parts. If you are making 800hp on a stock bottom end I bet your torque is 11-1200ish.
I have this crazy theory that if i keep the rpms up above the curve that it may live a little longer.lol. I really dont know the exact whp but it runs mid 7s with a 96mph + trap with a crap 1.8 60' on 305/50/20 cooper zeons. I have maybe 25 passes with it at this level. I am afraid to do a compression test but I have zero smoke at idle(100% over injectors at 8k idle psi)