Just so you know, that truck is gonna absolutely SUCK on ice and snow. Those tires are designed for digging through mud :p If you wanna get good traction with the thing, get it some tall skinny tires, the smaller the contact point of the tire with the ground (with good traction promotion in that point) the better your traction will be
I've got 32 x 7s on my 2wd truck, and I can easily out accelerate / stop before a buddy of mine with a 96 Dodge 1/2 ton 4x4 with 33 x 11.5s and a 4 inch lift :P He can get outta the ditch a whole lot easier than me though, lol
All that said, that is one SWEET truck man

I'm planning to convert to 4x4 myself, probally running with 1 ton springs and 3/4 ton running gear and a set of 33 x 10.5s