Need help! Rocker shaft bolt broke in head. Need removal advice

Yea you got to drill it and use a easy out to get it out. I suggest that you first use a center punch to get her right in the middle and start with a drill bit 1/2 the size of the bit that the easy out calls for as a pilot hole. Figure out the maximum depth that drill bit will go to the bottom of the threaded hole and wrap some electric tap around the bit as an indicator so that you don't go into the actual head material.

Terry