I don't know if there is anything wrong with it. I have only driven it acouple of times in the last two or three years. I have noticed a dramatic drop in performance every time. I was thinking of rebuilding the heads and I figured I could pull apart the engine and make sure everything is good. I have some things that I want to do with the engine out so i thought might as well do as much as I can in one shot. Thanks for your insight.