Well I talked to my teachers at school and the most likely problem is either a blown oil cooler, bad seals on my cylinder liners, or excessive pitting on the cylinder liners from too much idling.
I hope its the oil cooler and I can get it back up and running soon, although there will probably be some damage from overheating. If it was the seals or liners, I'm looking at doing a complete engine rebuild. If a rebuild is necessary I will be lifting the body off the bus, taking the engine out of the frame, and doing an insane amount of rust repair on the whole thing. Some of you may think that's crazy and I should just get a new bus or engine, but like I said before, I'm in school to be a diesel mechanic and this could be the best learning experience possible. I know I've been promising pictures and I will deliver, especially if I get into a rebuild and pulling the body.
I'll let you all know whats up as soon as I know.
"Once you get it, you got it."