Had the same problem on our 440, leaking at the rear, luckily it was on a dyno and I had to take the engine home to advance the cam so went back to the old set-up with Permatex Spray-a-Gasket, the red stuff, next time on the dyno, dry as a bone!! Sure glad it wasn't the rear seal!!

Jegs was good about the return, they've obviously heard of the problem before, good idea, bad execution.

Maybe the problem is fixed now, my gasket/tray combo was a couple of years old before I used it.

Joe