I have already posted this on Sccoa but not many people are chiming in. I took the car to Dallas Mustang to have it Tuned...On the last dyno run, after he let off the gas, I heard a tapping noise on deceleration on the dyno...After that I have a loud tapping noise coming what seems to be the valvetrain of the car...I have torn down the motor and the pushrods are all straight, the rockers are perfect, the springs are not broken, and the lifters are fine as well as the cam. When I had to drive it back...off the line it had plenty of power through 4th gear bunt under lots of load in 5th the car would shake and feel like it is missing. The noise goes away above 2500+ rpms or at least it is hard to hear. Any ideas?