Re: oddball oil trouble
IH engines are know for having low oil pressure, yet plently of oil "flow". There are many drain back passages, I would be pretty suprised if that were your "problem". I really don't think you even have a problem. I take it you are reading your oil pressure by the dash gauge at idle, that is when it will be at it's lowest, what is it at 2500 rpm? What is the condition of the oil? Filter? You checked the oil level when the engine was cold? Get it warmed up, shut it off and see what it is after a few minutes. It's pretty easy to mount a pressure gauge onto the engine, with a real gauge you can calibrate your dash gauge. If your engine has been "damaged" due to lack of lub I think you would be hearing some knocking, or having over heating problems.
Good luck and happy trails,
If your not living on the edge, you're taking up too much space.