[wkooiman]

George helped me fix them. The rockmounts are great.

I have to say the problem was probably installer error (me). I tried installing my rocker shafts with too short bolts. Most stands were okay, but the oiling stand didn't engage enough threads, so it popped out at about 10 ft/lbs. I got the correct length bolts, and replaced the heli-coils, and they were okay.

A few months later, I had the rockers off, and they pulled out again. This time I had everything right, but I guess I had already messed up the threads enough from my earlier snafu. George fixed it with a rockmount, and it is holding great.

Later one pulled out on the other head. I'm guessing I just over torqued it (about 35 ft/lb). It popped out at about 6,000 rpms. I fixed that one with the engine installed (67 Mustang). It is holding great.

I'm no master mechanic, but I'm no dummy either. I don't think I would have had problems if I had measured everything carefully, and torqued the studs to 25 ft/lbs. Still, the heli-coils pulled way sooner than I expected, and the Edel heads seem to be very high quality.