dont know if you found this thread of mine on difflock
but youre going to hate me if you havent, be prepared for a long read
electric 4x4
http://forum.difflock.com/viewtopic.php?t=10868
hi Adam
the name of the shaft you are talking about is driveshaft if its open and can be see like a vw beetle, if its hidden up the inside of an axle tube then its called a halfshaft for some reason, your english is very good far far better than my croation
l think vw beetle front suspension would be a good choice simple and very strong, you might even be able to use the rear as well ?
Andy
Often though of doing something similar with an autobox FWD mounted sideways
having 4 wheel steering but no steering wheel
On your left side have a joystick affair which through hydraulics works the front steering and if you pull back it brakes the left wheels
On your right side the same thing for the rear wheels and right wheel braking.
And for your feet an accelerator and brake pedals
With regards to the passenger. Put the passenger behind the driver, with the legs on each side of the driver. And put the passenger high up so they can see up over the driver. Then, when "carrying the pillion" use an "extension" to the roll bar so their head is protected. When you want to go "solo" you can unbolt the passenger's hoop and perhaps the seat/belts, and all you've "wasted" is a slight space above/behind the driver, and a bit on the sides for the legs/knees.
... would that work?