Hello, I am ready to purchase and import a 1997 Land Cruiser HDJ81V 5 spd. w/ L.S.D. to the states but I am not sure if it is full or part time 4wd. It is advertised as a limited slip differential so can this still be a full time 4wd model? I do not want part time 4wd, only full time 4wd. Can aftermarket lockers be added even tho there is no central lock diff? I would absolutely appreciate any help. Thank you