remote oil filter fittings tapped right into the block UPDATE in post 58 and the whole idea got 86ed

Just something else to check:
I had the exact same symptoms on my engine recently. Oil filter was wet, above it was dry. I changed filters 3 times, changed oil pan gasket twice, checked around oil press. sender, valve covers-all dry. It turned out to be a leaking rear main seal. The flywheel was throwing the oil right onto the filter. Just food for thought if you're running a 4spd.
It's a 727
But...I may be on to some thing
I'll check back in a few hours