Yes, the hole is in the urethane. I wish I had my roommate's digital camera right now to help me explain. There is a hole through the poly block such that if the transmission mount was installed, there would be a hole running from driver's side to passenger's side horizontally through the mount. Its not threaded or anything, just an oval shaped hole. It is off-centered front to back so that depending on which way you rotate the thing, it could be either towards the front of the vehicle or back. Everything else is symmetrical so if you rotate it like this, this hole is the only thing that would be different, so I can install it either way. I guess I have a 50/50 shot of getting it right, but I wanted to see if anybody else has ever done it. It is the same part number for all CJs and wranglers from 66-96 it says, so if anybody has done this, please let me know.
thanks!