Got things put back together and running. The engine lube-oil system operates as it should.
Still got to do the initial petty leak fixing and dial-in the waste-gate, etc. Finish the air-filter plumbing, ect.
I need to put 50 or so gentle miles on the turbos before I get on them hard.
Took it around a long block, and slowly bringing up a few pound boost found a not tight enough charge-air hose clamp.
But it runs.
Fun with dad - YouTube
Again, thanks to those who offered support sorting the oil pressure mess.