i don't know how you are getting that much power out of it??? ive had the bottom end rebuilt, balanced etc, head was tidyed up, flat top pistons (high comp), AFM modded by datrally, exhaust manifold modded and 2 1/2" mandrel bent zorst. to dat i can only churn up ~84rwkw. and ive been told with headwork,cam,injectors, ported manifold,65m throttlebody,extractors and a decent engine management that i can only get 250hp out of the thing.