Offhand, I don't know and can't quickly find that, but I'd suggest that you bring along as many wrenches, screwdrivers, and tools of as many types as you can - - not just one or two. You'll need a few of them to go over the truck. Have relevant manual pages and lots of photos to compare for missing parts.
Old and new give a good cross section of info:
TM9-1840A_engine_clutch
TM9-2320-212-10_M37series_operators_manual
TM9-2320-212-20_M37_M43_M201_manuals
TM9-2520-232-35_M37series__transmission_manual
TM9-8030_M37series_operator_manual
TM9-8031-2_M37_power_train
Pull all the fluid caps and check for burn or milkshakes or weird looking or smelling lube. Dollars to donuts the gas tank will be rusty inside and the brake lines shot throughout. Plug wires need to be snug in the fittings at both ends. Electrical wires will likely be brittle. Check for burn marks from shorting throughout.
I just sold mine because the Deuce demands my time and I wasn't giving it the attention she needed. Make a ballpark guess of $1500 - 2K baseline for needed-for-driving parts in the near future to advise your budget, and add in any labor time you might have to hire out. That will give you some idea of expense.
If you haven't downloaded the manuals yet, do so without delay because you'll need them for visual inspection and answering questions like '...what size wrench...' Get to know vintagepowerwagons.com, midwestmilitary.net, and battlewagons vendor on Ebay. Those are good parts sources. If you haven't signed up on G741.org yet, you're late.
M37s are wonderful. I'm sorry I overextended myself and had to move mine along.
Best,
Steve