I'm going to fall back on my original statement. You must make sure the head is equal front to rear. Do us a favor, you and me, put a lash cap on one of the valves and see where it marks. Remember, the adjusting portion of your rocker arm is an extension of the push rod length. To raise the valve stem with a lash cap effectively shortens the push rod. Again, the head has to be equal front to rear, it must be done! Put the head on the block and mark it where the cylinder and combustion chamber mate. Radius off all sharp edges around the chamber and maybe a little on the edge of the cylinder. Polish the chamber and piston tops. Grit your teeth and go for it!
