Hey man, bummer on the oil report. Here are a few things to consider
1) You have got top find out hwo that fuel is getting intot he crankcase adn stop it.
2) WVO will not burn well at idle temps, once your EGTs go below 400 you'll be having a lot of unburned and partly burned residuals.
3) WVO can have a lot of FFA acids from burning and cooking in it, which will cause an acid attack on your bearings.
The prolonged idleing may be the actual cause of the fuel in the oil, as 30 minutes would be real ******* her. I was told that you shouldn't idle an IDI much longer than 5 minutes without a fast idle lever or I guess an exhaust brake may have the same effect.
With the oil pressure, the number you need to pay attention to is the hot 2200 plus RPM pressure by the mechanical or electric gauge. It must be at least 30PSI, although IH really spec'd 40 for all 7.3s and newer 6.9s(why I don't know if 30 was fine for the 83-85 units) and I'd like to see hot idle oil pressure be at least 10.
On the plus side the damage may be done, but you may have many trouble free miles ahead especially if you correct the problem. I had a 103PPM oil report that I posted about here and over at TDS. That was about 20,000 miles ago and I still have goo power, oil pressure and no abnormal noises. I would monitor teh oil pressure adn send blackstone a sample of the new oil once you have followed the suggestions here about idling. Good luck....at worst you and some of teh NE IDI brothers can poull it out and learn how to do bearing R&R once the other metals get too high for comfort. (Copper and Tin)