just as a follow-up....
I did get them installed with the shifter on Christmas Eve. Awesome! So much better than messing with gasket cement. Prob is that I have since re-installed the factory shifter, due to excessive effort required to shift crappy Tremec. I have a doctor wanting to do carpal tunnel surgery on my shift hand, but I am not opting for it.....so, have to take it easy and go with longer shift throws. May have a buyer for the shifter, already. If not, it and the gaskets will be posted in the Registry. Thanks again, CobraBob.
pat