with a 2 inchbody lift it will but without one it wont.
the 79 had a L43 and short style tcase, this made for having a short tranny tunnel but the 83 has the L52 which is about 2 inches taller than the L43. so as long as you run a 2 inch body lift it will work great.
Im no expert but i have done a few cab swaps and the body bolt hols will line right up
