What larryboy said.
However, your statement: " The bolt just kept spinning but wouldn't come out.
I put a little sideways English on it and the bolt came out. Minus the threads.
" is very thought provoking.
Do you think the bolt may have been broken before your application of "sideways English" ? Once the broken bits have been removed, check the swing arm for an elongated hole where the shock bolt resides.
Best of luck.
BTW, Locktite gives up its grip at about 250 - 300 degrees F.