Have a look at this
http://www.mapleleafup.net/forums/sh...ad.php?t=29409
It's a job that's very difficult ( impossible ) to do correctly if the crankshaft is in position.
It's a job that's normally done during engine assembly .
Using a appropriate tool, the new rope has to be "rolled" or forced into the odd shaped groove that is machined in the engine block . And, some permatex sealant is applied under the rope to prevent the oil seeping under tne rope. Then, some grease is used on the rope to prevent it from burning during the first start up.
Some of the currently available rope material is not good quality. I would go to a reputable engine builder/machine shop and ask what rope they use., and buy the rope from them.
Apparently there is a modern rubber seal available, I wouldn't use a rubber seal myself. On the G503 forum, many jeep owners have reported problems with using the rubber seals as a replacement for the original style graphite impregnated rope seal.