73-87 ? cab swap please help

[slt0066]

i am trying to help my nephew restore my grandpa's 1979 4x4 3/4 ton camper special
the body is shot.. but i think he can get the frame and running gear back in shape
I want to know if my 1984 chevy 2wd cab,doors and bed will fit ?
will the 79 fenders and hood bolt to the 84 cab? i think the hinges are different?

hey guys any help here would be great I know i can search and probably find this out but hopefully someone out there can help me figure this out quicker ..Im more famililer with 67-72s to make things more complicated he's from mo and i live in nc and im going to try to send my truck home this weekend if it will work for him so he can drive the 84 while he works on grandpa's 79.
thanks for any info you can throw this way