Rear Main Seals ?

If the seal has been replaced already(motor rebuild) then it is most likely a lip seal already, and you won't need the sneeky pete. Just push it with a punch, then pull it with some pliers.

I prefer the lip seals myself, and feel that rope is best used for tieing your shoes.

Just make sure you put ti in with the lip going the right way...(there should be instructions)