Mine is a TF and not an AD, but it didn't have a bed on it when I got it. I found a 12' flat bed (with panels, that I don't use) for $250 and put it on, then painted it. It all depends on what you want to ultimately use your truck for.
~ Victor 1941 3/4-Ton Pickup (in process). Read about it in the DITY Gallery 1955 Grumman Kurbside "Doughboy" 235/3 on tree w/ OD 1957 3100 - moved on 1959 C4500 Short Bus "Magic Bus" - moved on 1959 G3800 1 Ton Dually "Chief" - moved on 1958 C4400 Viking "Thor" ~ moved on to fellow Bolter