The transmission mount is right under the u-joint ball of the torque tube. Can be oily (especially when a bolt is left out - which was the case on mine), but not hot. I think Polyurethane would stand up to oil pretty well. It will have to be a pourable substance that sets up, because there are two plates riveted together and a center plate with larger holes in it so the mount "floats" without metal-to-metal contact.
Kevin 1951 Chevy 3100 work truck Follow this saga in Project Journal Photos 1929 Ford pickup restored from the ground up. | 1929 Ford Special Coupe (First car) Busting rust since the mid-60's If you're smart enough to take it apart, you darn well better be smart enough to put it back together.