1988 international s1600 truck

This was a uhaul box truck. We were going to make it into a car hauler but just don’t have the time. It was told to me by the previous owner that uhaul rebuilt the engine but I don’t have documentation. It has a 7.3 liter international diesel motor. It starts right up, runs strong, and sounds right. Holds a steady temp and steady oil pressure. Runs down the road like it should. AC works. Interior is nice. 5 spd tranny. Has rear air suspension with an air dump.