The base/shell/frame is pretty easy.. Send me what you want for tires/rims combo.. axle rating, brakes or no brakes... and I can get you some numbers..
J
I planned on using FJ60 wheels and 33" BFG KO tires along with a 3500 lb axle and 10" electric brakes. I was thinking 60" wide by 108" long, hitch to tailgate, outside tire edge to outside tire edge.