while I am not saying you don't have fab skills, winnebego and griffin might have a little more in terms of research and tools at their disposal...
homebuilt like that usually doesn't end up well
I would do a cab swap
also, I forget which is which, but the floor of the bed on 1 of them is lower than the otehr, and it raises an issue with the feet area for the rear passengers, I think they wont have a feet area, on a pickup bed, but they do on a 4runner
