So what did it make on the Dyno and at what RPM? You seem to imply that it didn't make the goal of 450hp or maybe you just didn't have the seat time to confirm?
You didn't mention what budget you imposed on him. If you said he had the freedom ($$) to use better components then he is a fool. If not then he did the best he could with what he had to work with. Besides all of this--There is no such thing as warranty on race stuff. Most true and experienced racers acknowledge this and resign themselves to the fact that **** breaks when pushed beyond their limits. J.Rob