Hi Art. My car is a 26 Tudor. You can see my car here
And you can see what I’ve been doing with it here.
From my experience, I don’t recommend trying to do it in the car. For one thing, if you’re going to use a RTV type of sealant, both surfaces are going to have to be dry with no oil residue or there’s a good chance that it may not take. You’ll need to get it far enough apart to be able to make sure its clean and dry. I’m happy to offer advice for future questions, but ultimately the choice is yours as its your car. Good luck with whatever direction you take.
Mark.