Looks like he sent you an oil pressure sender, a coolant sender from the drivers side head?. The wires are part of the pass. glow plug harness from what I see. They connect the 2 plugs that go through those heat shields
You can wire in an override using an older Ford Starter relay or something similar. I have one on my 95. Just take power from the hot side of the glow controller and put it on the input of the relay. wire the start terminal of the relay to a momentary switch, then the output side of the relay to...
All I know Will is I get a lot of sludge in the centrifuge, so it does help.
This truck gets about an hr. of run time each day, 30 mph max feeding cows. The centrifuge would likely work a lot better on a long run.
It's a 6.5 Will, the oil is always black. I've let it drain over night, put new oil in, start it and the oil is black. :D
Probably about 40 psi when driving, 60 when cold
In 2 of my trucks which sit outside I use Shell T-6 0/40 year round. Almost instant oil pressure even at -30 C. my Duramax and my 98 6.5 will start at that temp not plugged in. The 6.5 is the better starter.