The Dakota short box pickup and the Studebaker are both on 112" wheelbases.
Both have nearly identical dimensions. You can cut off the Dakota cab and box sides, leaving the cab floor, firewall and bed floor on the frame. Take the rusty floor and firewall out of the Stude, and drop the cab onto the Dakota floor. Cut the sides off a Stude short box and weld them to the Dakota floor. Fill in the gaps. My buddy does these swaps all the time and it is amazing how they work out.
I have a 50 Stude short box pickup and a Dakota short box pickup that are going to be combined this way.
Another friend did this exact thing to 2 54-56 Ford pickups and it was amazing how the floors and firewall mated up.