82 4x4 conversion

[gloege82]

ok, so right now, i have a 1982 gmc c2500 6.2d. i also have a rusted out 82
k2500 im using for parts. my first plan was to just put my motor and body on the 4x4 frame, but that frame is pretty rusty, and all the brake lines, gas lines, gas tanks, e brake cable, etc are all shot. so since my 82 2wd frame is in good condition and everything works on it, i was wondering how hard it would be to just drill out the rivets mounting the 2wd front end on, and all the rivets for front leaf spring mounts on the 4x4 to put the axle underneath the 2wd. the c2500 cab is a manual, so im pretty sure the hub will work with a tcase.

any other things i need to address? all input will be appreciated.
thanks