93 Chevy 2500 flatbed with 3116 Cat Diesel. Issues?

[Too Many Projects]

Steve is right on. IF it has a Cat engine, it is a transplant. A 3116 should be electronic injectors with a turbo. Electronic injectors are not as susceptible to the ultra low sulfur fuel. Again, IF it has the correct Allison behind it, it could be a strong combination.

Might be worth a trip to check it out. IF it is a Cat, get the info off the assembly tag on the block to research the build, especially date of manufacture. Some of the early 31 series Cats had a history of head gasket issues. The 3176 did, but I'm not familiar with the smaller 3116.
Steve mentions algae in the fuel. This can be picked up at a station with contaminated fuel too. My '92 Pete got a dose of it once and it can be remedied with treatment, but it is a PITA to clear up.