Terry,
I run the more modern setup with the PCV in one valve cover and a breather in the other. I made a blockoff plate for the rear manifold opening.
I too had a small leak at that location. It started a year or more after finishing the car.
I removed the intake, cleaned everything thoroughly and reinstalled with Fel-Pro gaskets, but no end seals.
The first time I had used Permatex RTV, but this time I used an RTV from Valco. I sealed the intake gaskets to the head with Fel-Pro gasket adhesive and let them set overnight.
Then I put a healthy bead of RTV on the end rails and carefully lowered the intake into place, snuggung the bolts just enough to settle the intake onto the gaskets. I let it set this way overrnight and then torqued the bolts in sequence. I now have a 100% dry FE, one of very few from what I've heard.
Hope this helps,