i was looking around and the only nsx's in my price range are older na1 nsx's with 90,000 miles or more, and i was wondering if i plan on mostly autocrossing and occasionally track racing the car with daily driving would it not last very long? i would definatly take good care of the engine and would replace any little things that would or could go wrong like head gaskets. how long do these engines usually last? and would a turbo or supercharger with no more than 8psi be too much for a high mileage engine?