any early 70's light duty IHC (inc scouts) and dodges used a right hand drop independent 205. the dodge has weird yokes though. one should be able to take a r/hand drop from a married unit and gut it and put in everything from a left hand drop ford independent 205. it is just the case that is different. I would do a little research on that if you can't find a complete one. I know where there is an IHC one but it is a little ways from you
I have one of those caps that you need. I have a T221 with a toothache that I am going to take apart. UI am taking it apart for someone else here who needs some pieces. I may be able to help you if he doesn't need what you do.
sounds like your bearings wore out and the the shaft backed into that rear cap
ron