M37's are rated at 3/4 Ton off road and 1 Ton on road. The military used to rate the vehicles according to offroad capacity, hence the Duece is 2 1/2 Tons offroad and 5 on road. Like all ratings from the early days, they were drastically underrated in both capacity and engine power. We've all seen where a duece will haul 22,000 pounds and an M37 over 3,000 with no problems. I'm only speaking from experience though. I saw an interesting M37 on ebay the other day, it had a diesel engine in it. A Nissan I believe, something about DT33 or thereabouts, I don't recall the actual engine model. Seemed to fit rather nicely in the engine compartment. I did notice the floor pan had been modified to alllow for a shift lever farther to the rear of the pan. I wonder what the power and mileage comparisons would be.
Regards,
M376X6