Got a 15% off discount at (everybody luvs) Harbor Freight. Flyer also had their 1 ton gantry crane on sale for $529. ($70 off). I also got the 15% off the SALE PRICE(!) so the crane cost me less than $450. Added a 2 ton hoist for $70. I already had a chainfall and load leveler.
Below are some construction pics. Its pretty solid. I've already had 500lbs on it and it didn't even make a noise holding it.
Only part that sucks is that it WILL NOT fit over a later M series bed. I have a drop side off an M-35 (free to good home) and it is 95in wide. So is the crane. But the hinges stick out another 1/2 inch so no go. It will fit the CCKW bed, and the cab is also not a problem. At the max height (12ft) it should lift the cab over the engine and off the frame... or back it off the rear over the wheels. Either way its good.