Hmm long topic.. snorkels..
I'll just drop a little info of the rig I bought to rebuild for an adventure truck.
It came from the factory able to ford 42" of water, but also came with a snorkel (intake and exhaust) set up to ford 7 foot deep water, basically you put the snorkels on, take the top off, stand up and using the hand throttle drive through water deep enough that only your head and the snorkels are above water.
The only real diffence in ignition is that the coil is inside the water tight sealed distributor, and the plug wires are also screw on waterproof type connectors.
And this is a 1953 truck, the Dodge M-37.
Snorkels have been used for a lot of mlitary vehicles for deep water fording, trucks and tanks alike for over half a century. They do work provided your driveline vents, igntion etc. are set up for it.
As for what I read about your fan getting sucked into your radiator in water, many if not most fans have a friction clutch that would prevent this. I used to hold fan blades still with my hand with an engine idling to set timing on some vehicles. The fan in water would splash a bit and basically come to a stop as the clutch slipped. Listen to vehicles going into deep water and you can even hear it happen.
Only a thin flex fan with no friction clutch would have that issue with flexing into the radiator I would think.
But unless your going to run through water over your hood it's not something you need, and many if not most water that deep that a track crosses will be moving too fast at that depth to ford anyway snorel or not.
