From what I've gather online from message boards and other member's posting thru the years is 650HP is "comfortable" 700hp is about the max for it to live an okay period but will eventually break. 800HP..will break sooner than later IMO

And like Pittsburgracer alluded to. Some guys will brag about how many years there stuff has been together, but yet might race 2-3 times a year...12 passes a year vs 200 passes is a HUGE different in the maintenance of a race car.