Jammer,
That's an M-211 series 2.5-ton truck. The tranny is most likely the original 8-speed Hydromatic which I think is still not too hard to find parts for (some of the others who know more about the early autos can tell you more). The M-211 (and M135's) replaced the WW 2 CCKW trucks and were produced from 1952-1957. The engine is a GMC model 302, 6 cyl, in-line 301.6 cu in, 130 hp gasoline engine.
That one looks pretty solid. Do a search for the military vehicle sites (a few are listed on our own Links Page). That's not as exotic as you might think. Do some more research before you categorically turn it down -- especially if the price is right
Good luck
John
