[olddog]

Oh buy the way, pull the valves on that cylinder and give them and the seat a good look. I had a throttle plate screw go through an engine and the intake valve closed on the screw, cutting the seat and valve. It only looked like a scratch, but it was deep. The valve couldn't seal on the power stroke and it kept lighting the fuel in the manifold under load.

So learn from my misfortune, check them before you put it back together.