I'm looking at a 1986 Chevy C60 Dump truck with a Detroit Diesel. Is this the same diesel they ran in the chevy pickups of the day? It is non-turbo, naturally aspirated. What would be the HP and torque ratings? It has 178,000 on the clock. how much life is left? I have zero experience with GM's diesels but have been running a Cummins since 1999.