I thought about it too. Trouble is the back is as narrow as the front.
I think to make a decent looking crew cab out of it you'd remove windshield and firewall with windows, add a real cab back with window. To do so you'd have to move the rear set of doors out at the back, making them more parallel to each other by widening part of the roof. Then you're left with vent windows on the back side of those doors which look funny, so you remove them and square up the window frames...
At which point you may as well have started off with 2 stock cabs and not the federal truck cab in the first place.
Grigg
