With that much oil going up the distributor shaft,,I would suspect excessive crank case pressure.
I can understand why you might suspect that but I don't think that is the case. I've not been making any long blasts with the motor at high RPMs (yet). There's no evidence of leaking oil anywhere else. The breathers are clear, the valve cover gaskets are not leaking, and the PCV valve is working properly. If the crankcase pressure was that high, I'd expect to see evidence of it in other places and I don't. In my old 493, after a run, when the crankcase pressure was at it's maximum, I'd see a little oil in the breather - I'm not seeing that here.
I did some research on this on and apparently this has been a common problem with recent Mopar distributors. I'm not the first person who's experienced this. Someone who's seen this before tipped me off that it might be the distributor and not the front of the intake. I'm glad he told me that and I checked before I needlessly removed the intake...
I'm chafed but this could have been worse - it could have easily been mistaken for an intake manifold front seal leak and I could have spent a lot time going down the wrong rabbit hole...
