Distributor filling itself with oil

Gee, thanks rusty! Really helpful!

Everyone else:
Distributor was torn down completely yesterday. No burrs found on shaft, but polished with 2000 grit anyway just for kicks. The i side of the housing had no passages, nor and obviously missing seals or damage. Nowhere to put permatex, nor anywhere to drill vent holes like dui reccomended with the chevy distributors. No smoking gun i could find.

The pcv valve not stuck, and pulls significant vacuum through it. No blowby or crankcase pressure noted with the oil fill cap. Tested via putting a paper towl over the open oil fill hole and revving the engine. It didnt blow away like id expect with an issue.

Keep the ideas coming yall. This one baffles me.