Guys,
Thanks for all the comments and suggestions, I can definitely use them.
Dry fitted the ratchet bolt and didn't like how tight the bolt sides were to the dished end of the double pulley. Not enough room to use a socket without shaving it paper thin. The bolt head was 1 3/8".
I rooted around my meager but growing parts bin and found a ratchet bolt which was 1 1/8" across, the threaded portion was identical to the first one.
After a good cleanup it will be installed with some medium locktight.
Once the back end is buttoned up the focus will shift to the front end and the shimmy problem. I suspect this will be more challenging.
Peter