6k+ miles oil update:
Pump from seal started leaking decent amount so i pulled it apart and inspected it. everything looked great no wear on the pump gears or shafts/bearings. For longevity I replaced the front bearing, which i found at mcmaster. 11/16 OD 1/2 ID needle bearing. I also replaced the seal from mcmaster, basic 1"OD 1/2" ID oil seal. there was enough room in there to double up the seals, which I did. It's nice and tight now and didnt leak for the 800 miles or so until today, when my chinsy homemade pulley lost the V belt part. I heard the rather faint noise going down the highway, got nervous but everything kept running. the belt must have stayed running on the 1/4 or so of the v part left. Didnt know something was wrong until i tried switching to oil on my way home, when the engine pretty quickly sucked the IP dry and killed it. Was able to re prime and roll start it by switching back to diesel and dropping into 4th. Had just started slowing down on the shoulder when she caught again and took me home. Bad moment, need to make my stuff more sturdy this time.
it was a trimmed down stamped v pulley from the farm store, and actually expected it to fail at some point. I purchased a much heavier steel v belt idler this evening and tomorrow I will try on the lathe to graft it onto the alternator pulley.
Mcmaster oil pressure relief has proven to be reliable, frantz TP filters are still working great, heat exchanger is working great in cold weather, and have still been playing it safe with purge times. I did have to cold start (35f or so) on oil the other day cause i was out of diesel and didnt realize it, truck was on an incline too. IP wasnt super happy with that but it got me rolling to the pump to grab some more diesel fuel.