Recently I have seen number posts about failures.Some seems to be because of T/C's not having anti balloon plates and it seems tranny line pressures are effecting the failures too and some because of throw-out bearings having too high pressures not completely releasing. But I am thinking it is a design flaw in the cranks/block. That is the comments I am looking for from you guys. This is the trusted site for info. Jerry-the aftermarket is saying the stock aluminum blocks are ok for f/w hp of 800 but after that you need a aftermarket block because the oem's deflect.