360 Rear Main Seal

Us a long self tapping screw in to the exposed end of the rope seal, trying to avoid contact with crank surface, but don't worry about block side, grab the screw with pliers, and pull gently as someone turns the crank.
The rope will just follow the crank.
It hasn't been nec to loosen mains in my last few experiences.
Dress, and polish any nicks to crank,
Just push to install modern rubber seal.