Ummm, back to the original subject... hate to spoil the fun but somewhere I remember a question going by about brakes.
The early M800 series trucks are air over hydraulic and the deuce brake booster stuff may work if you have enough master cylinder capacity.
The later M900 series are straight air and so the booster is of no value. But you'll need to convert to an E series brake valve and upgrade the air system with; compressor with enough output, a wet tank, air dryer, emergency (spring brake) valve, relay and quick release valves and the air line plumbing to make it all work properly.
I thought at one point that disc brakes on the baby HEMTT would be a nifty changeover but it seems that Rockwell military axle housings' have different backing plate flange bolt patterns than the civilian axle housings. So much for a bolt-in swap.
Having to make new brake caliper stands was the stopping point for me; although some cold rainy winter night I may dust off the idea.
The self-cleaning, ease of maintenance benefits are marginal as the military Rockwell drum brakes are more than sufficient to stop a fully loaded 5 ton.
A better conversion would be to "S" cam brakes from the original wedge brakes and parts for that swap are out there and cheap.
OK, back to your high jinks, you little scallywags.