The engine rebuild video listed here a week (or so) ago showed a dab of rtv being applied at the case junction when it was crossed with another part, like the sump. The same occurs on a SB chevy where the heads hit the block as the wet bottom manifolds meet there. Same solution. Just use RTV sparingly as a clump in the oil pump will REALLY ruin your day.
The engineers at Conti would not accept leaks, the three engines in the club planes stayed dry. If a leak starts, fix it, was the rule. If you don't, then you will miss the next, and the next, and it will look nasty all the time.