Deep Water Fording

So I want to waterproof a few CUCV's and not sure if I like the Humvee setup. I will already have an air system on board so looking at a M35/M939 type DWF system. I know the basics like all the vents for the drivetrain and intake and exhaust. What else needs sealed and or vented to protect from water intrusion?

A flaw on the HMMWV vent system is that all the gear cases tie together, this has caused plenty of problems when something goes wrong in one place and sends fluid to all the others. As cheap as that poly tube is, I would run separate lines for each gear case to a central point, maybe behind the seat in the cab.

Fuel lift pump. The stock unit has two vents on the dry side of the diaphragm.
The lever and spring are on the crankcase side, the lever pulls on the diaphragm through a rod, this rod runs through a bushing which reduces the chance of a ruptured diaphragm leaking into the crankcase.

Now, the CDR is going to be an issue since it keeps a tiny negative pressure in crankcase. Deep water fording kits usually have a bit of positive pressure.

Vacuum regulating valve on the injection pump vents air in through a foam filter.

Electric motors in blower and windshield wiper.

Power steering pump reservoir.

Even if you try and seal and vent everything you think of, water will always find a way into something. Taking all the precautions is smart, but doing maintenance and checks on all systems and fluids once the water fun is complete is wise insurance against rust and component failures.

If you care about your vehicle don't go above the tires. It just destroys everything whether the drivetrain is sealed or not. I also think alot has to do with the duration of exposure.

Watch 4wd 24/7 on YouTube. Those boys are up to the windshield on every trip and they don't have problems. But they also stay moving and get out fast.

Thanks for the input guys, I have been putting square bodies in water up to the windows since '83. Yes maintenance is important! Just wanting to build a good truck that will live as long as possible because of flooding and mudding in the deep south. Thinking about adding an air line to my spindles like the vacuum lines on ford F250's so I can put pressure in them along with all the other components.

So does anyone know of a widely available regulator use to supply 2-5 psi to my system?