I'd swap a 2wd cab on a 4x4 frame before trying to convert a 2wd frame to 4wd..there is a lot of differences,you'll be chopping rivets and swapping spring hangers,drilling holes for front shackles,etc...in your case since the 2wd frame is junk at the steering box,I would say the 4x4 frame would be a better option..
The cab swap would require a small body lift or the center hump modified possibly to clear the transfer case,that's about it...my '77 GMC had an '85 2wd cab on it,they put a 3" body lift and also raised up the floor hump to clear the NP-203 it had originally--I put a NP-205 in it and it probably would have cleared the floor even with no body lift..
I like divorced transfer cases--with one you can put any transmission you want in front of it easily,and use cheaper car or 2wd ones instead of the costlier and harder to find 4x4 ones...manual or automatic...
I dont know why they decided to marry the transfer cases and transmissions,I never saw any real issues with having a third stubby driveshaft and 2 more u-joints..
I'd go for it if I were you--use the 4x4 frame,the 2wd cab,divorced transfer case--you'll have a nice truck when its all assembled..
The cab swap would require a small body lift or the center hump modified possibly to clear the transfer case,that's about it...my '77 GMC had an '85 2wd cab on it,they put a 3" body lift and also raised up the floor hump to clear the NP-203 it had originally--I put a NP-205 in it and it probably would have cleared the floor even with no body lift..
I like divorced transfer cases--with one you can put any transmission you want in front of it easily,and use cheaper car or 2wd ones instead of the costlier and harder to find 4x4 ones...manual or automatic...
I dont know why they decided to marry the transfer cases and transmissions,I never saw any real issues with having a third stubby driveshaft and 2 more u-joints..
I'd go for it if I were you--use the 4x4 frame,the 2wd cab,divorced transfer case--you'll have a nice truck when its all assembled..

itan fine before I parted it out . 