Oh, dear. I don't know much about the 3126, but I know some about the C7. If it's anything like the C7, you're going to spend a LOT of time fixing oil leaks.
A friend on another forum bought an FL70 Ambulance with the C7 against a lot of advice from others. He was going to strip it and use it to pull his toy hauler. He had it about six months and finally sold it for quite a bit less than he gave for it.
Hope you have better service from yours, and, welcome to TDR.