[Ggmac]

I’m not sure if your engine has a rear seal . It could have a slinger . Unfortunately I can’t remember, even though I had a 41 engine apart last year . It stinks getting old . Better than the alternative.
I would look for a good running engine that would fit your car and then rebuild your original.
Sometimes a simple rebuild takes way longer than you anticipated . It’s much more fun driving your car than paying bills for it and not enjoying it .