newer S10 frame compared to older S10 frame

I have a question. I have a 1984 S10 frame and a 1996 S10 cab. Will the 96 cab bolt right on to the 84 frame? What about the core support and bed? Will that stuff bolt up too? I guess what i am really trying to ask is.... Are all S10 frames the same?? I know the frame horns are alittle different on the real old frames (bumper mounts bolt on)

the only difference is the bumper mounts and the crossmember is different but the holes are the same.