[tbucketnut]

I personally would not do an in vehicle rear main R&R at my age.
Couple reasons, the main being the bellhousing must be removed of course and that is the main support of the rear weight of this very heavy engine. I definitely would not hang this engine off the front motor mounts, that would be a Darwin award winner if the vulcanizing let go of the motor mount biscuit.
Then to consider dropping the pan and then the main caps to drop the crank, oh god then to try and fish the upper seal out. Total F that. Bring out the engine and give it a cleanup and spray can rebuild, get the engine on the stand and inverted and do it correctly that way IMHO. Im going to be 65, and have done a rope seal in the chassis on a smallblock chevy and still have nightmares of that one.
Steve