Short line mock up.
While I am concerned about the check valve restriction, I have to keep reminding myself that on my “race” motor that I spin 7500 it uses a 3/8 internal pickup and the bearings always look good on it when i take it down. Even with the restrictions on a 12AN line it seems it has to be getting more oil than the internal 3/8 pickup. I was first concerned about the 120 degree fitting at the oil pump being a restriction but it does hold 80lbs at idle.

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'75 Plymouth Duster
Phase I 451 906/590/2-660 10.75/126
Phase II 451 Stage VI/590/1050 9.82/135
Phase III 383 906/Victor-Pump gas 11.30/119

"For by grace you have been saved through faith. And this is not your own doing; it is the gift of God,"