To run 31's on a Samurai, It has to be modified from stock quite extensively. 3 to 4 inches of lift, extended brake lines, extended drive lines, different rims with less offset, change in gearing, ect. Not to mention the ride in a Samurai isnt the greatest. They are great little rigs, but as a daily driver, I would look for something a bit longer and would take less modification to get you where you want to be. JMHO, btw, I own one, and to run 30's I had to do a lot of mods. I still need to regear it to be able to use 5th gear effectively.
1998 Mazda B4000 4x4 stock
1986 Suzuki Samurai 1.3 liter, 30x9.50-15 Bigfoot XT's, OME Dakar springs, weber 32/36 carb, polycarbonate windshield, ZOR winch bumper, Smittybuilt winch XRC8, a work in progress.