1949 5 window on 1987 4x4 sub will it work

[frosty92]

I have a 3/4 ton 1949 5 window all original can get in it and drive it at any time only thing not orig is engine that the dealer warrentied in 1953-54 with a 228.
I am trying to deciede if i want to put it on a 4x4 frame i have a 87 sub 4x4 wheel base is the same but havent lookied at it close enough to really know if it will work
\here is a pic of what made me think of doing it.

Any input poss or negg is welcome
would it be better for me to sell the 49 and put something else on the sub

The last pic is what i was hopeing to come out with