With my motor with the bolt ons....I hammer the hell out of this truck. Not a problem yet (knock on wood). But really, I love my truck and I have a dent in the floor under the skinny pedal from standing on it. A little better cam would be the way to go, but that is your call. As I mentioned the fuel system on mine is close to maxed. Too many more add ons and plan to upgrade the fuel delivery system too.