Thanks for the update Norm. Mine runs fine but, of course, it was doing that before the Permatek. If I had a compression tester I would have done a "before and after" test but I don't, so I didn't.
I wonder if the other bolts together with the repair will be enough. Others here don't have much faith in the epoxy. I'll mow my lawn with it in the next day or so and I'll report back here.
It will be interesting to see how much effort is needed to get the head off your mower now.