This is the one that me and a couple of friends built, its pretty sweet for a couple kids in there late teens, huh?
Dont be afraid to contact Julian(his Email is on the Video) He'll let you know what we did and should have done.
most electric forklifts are a little low on low horsepower to be viable EV donors. your going to need something in the 60-70hp rating range to get any kind of stock-ish performance out of an EV.
as far as water crossings, i dont think the motor would be much effected by fresh water (mud may be a problem, but filters could probably be implimented). the batteries couldnt care less if they get wet. the controller would have to stay dry...but it can be mounted pretty much anywhere on the vehicle.
I don't work on electric cars but I've become pretty decently versed in electric bikes, power wheels and the like at my job. In fact I got a box of parts from a wrecked e-bike that I'm turning into a go cart
Jim I helped out here with a DC motor ranger. It wieghs a ton and has to have a limiter from tearing up the rear end (well if you let it go to the stock 7.5 all at once instead of a progressive rate). It does not last long on battery power, but is nice a tourqey (sp), and feels nice all around.