The grey and yellow/orange ones are LJ10's, both are 1971 models. Both are all stock, with an air cooled 359cc two cylinder two-stroke engine (28 hp!) Top speed is about 50mph; they are really low geared (at 50 mph, the engine is turning close to 6000 rpms!) The grey one is my favorite, mainly because it is right hand drive.
The brown rig is Suzuki's first 4WD pickup, it is a 1980 LJ81K I bought in Canada a few years ago. It has a somewhat larger engine (~800cc, 41 hp) that will do highway speeds. It is also completely stock (bumpers were dealer installed.) As rare as they are, I want to keep them stock, but I plan to do a few things to the LJ81 to make it more "expedition worthy", including a rear locker (LockRight #1520) and better tires.
My website is
www.lj10.com; there is tons of info on these rigs there.