Suburban to Crew Cab Conversion- Possible?

[Buddy G]

Hi guys- I'm new to the group and really appreciate the huge amount of info you guys have shared with everyone. When I originally thought about building a square crewcab 1/2 ton 20 years ago, I didn't know so many people would actually do it. So now it's time for me to actually build one myself. I recently bought a '91 Suburban Silverado with full power equipment, 350 and 700 trans. I plan to buy a short bed box and frame up to the back wall of a regular pickup and graft that into the Suburban. Has anyone cut a Burban behind the back seat and put a pickup back wall on it? The Burban roof has a kick above the rear seats unlike a regular crewcab, so I know there will be some metal work to be done. I hope to use the Burban rear axle and springs to keep as much in the same parts family for ease of maintenance in the future. Any info on this appreciated. Also, anyone with a nice short box for 73-87 with frame, please let me know. I'm near Baton Rouge and will drive up to 50-75 miles to pick up. Will buy a whole parts truck if needed. Thanks! Buddy G