Nope the 4D55 has a timing belt which drives the fuel injection pump and a seperate belt for balance shafts. That's how it knows when to inject fuel into the cylinders. I've done alot of reserarch on it. I dont make purchases without doing research. Buying a cheap used car that doesn't run you always take the chance the engine is beyond repair but for what the truck is and how hard they are to find and how badass and unique my truck could be with that drivetrain, I think it's worth the $500 risk. Worst case If it is toast I can make my money selling parts and scrapping like I originally planned. I've got a good 2.4L from my truck and all the parts to overhaul it ready to be assembled and installed so I've got nothing to lose really.

It sucks I don't have access to a compressor to run a cylinder leakdown test to make sure it's not block damage. Odds are if I did it would come out the crank case and the radiator anyway.