After 5 years I'm back at the 67 Barracuda coupe.

LOTS more knowledgable engine guys here. Yeah priming, a leak down and compression test?
Maybe pose the question in "small block" forum? Sorry not trying to get you worried, just better safe then sorry. Not sure if there ever was a quality issue with MRL, I've just read about "inflated numbers"
No 1st hand knowledge, just what ive read.
Do a search "MRL" maybe?
I wouldnt think pan or heads need to come off.
When you say "once over", do you mean take pan off and look at bearings? I took valve covers off and everything looked ok. Maybe take off head and inspect bores? I can do that, hope I don't have to. I'm going to try pumping up oil pressure and slowly rotating engine by hand and feel how it rotates. What do you think?
Mike