I Killed a Comanchee!

A buddy owns a rollback and tows cars for extra $$.He picked up a Comanchee that was sitting behind a shop for a few years,and the title was MIA,so he had to scrap it.I drove out there,and with the help of a Sawzall,I cut the cab in half and took the rear section in hopes of making my Waggy into a Wagomanchee...err uhhh Wagonchee...err something like that.

Before I tackle this project (which i reallllly wanna do),does anyone reccomend welding in some supports between the lower sides where the back will splice in,or if properly welded in place,will the cab section substantially replace any lost cabin integrity on its own?