Interchangeability question?

[FAT TONY]

Alright so while at school taking my TAKS test today i fell asleep and dreamed about my truck, but it had a fleetside bed then i dreamed again and it was a stepside again, so i was just wondering is it possible to interchange the beds on a truck..... like have to beds painted the same and then just change them depending on how im feeling that day, and how hard would it be to swap beds daily/weekly if it were possible? i think it would be pretty cool to have interchangeable beds it would feel like having two separate trucks