Great resource, thanks for the link. Are you sure there's supposed to be a washer under the bolt head though? The bulletin mentions the bell crank having a chamfered edge for the bolt which makes it sound like a washer would defeat it. I haven't pulled my crank out yet though so not quite sure I can confirm?
My front and rear rods seem to have zero bushing remaining - they are loose on the crank. I guess it all deteriorated over the years and perhaps that slop contributes to binding of the crank which in turn unscrewed my pivot bolt out of the frame? I did find that bulletin and I'll check to make sure it's within spec before reinstalling.
Slightly worried about using red loctite as it seems you need either an impact or heat to remove whatever was fastened. Is that what Grady recommended? I was going to use blue loctite.
I'll post some pictures and an update tomorrow afternoon.