Doc-
The engine has a 2x4 Blue Thunder manifold with a breather in the back and an
oil filler cap in the front. Also, Dave has a breather on each valve cover so not much pressure if any is internal but certainly there's no vacuum either.
Jack-
The seals are the new neoprene formed seals and they were replaced. It seems as though
oil is originating from the void between the back of the engine and the bell housing plate. I don't think the
oil is getting into the flywheel side of the plate because no oil is seen coming out of the vertical joint where the plate and the bell bolt up.
Our plan will be to probably pressurize the oil system but not run the engine with flywheel removed. This should tell us whether or not the seal is the culprit, or some other area is leaking under pressure, such as a hairline crack in the casting around say an oil plug or something out of the ordinary.
Dave and I certainly appreciate all your help with this and we'll keep you informed as we move forward.
Paul and Dave