The easiest and fastest thing, in my opinion, would be to find a frame from another AD truck. That's a whole lot less work than trying to configure a modern frame to fit your old body and vice versa.
Anyway, there are people on this forum who have mounted an AD body on S10 chassis , etc. There are probably a few AD frames laying around that you could use.
Go look in the parts for sale section and see if any are for sale or free. Also, post in the Parts Wanted section for a '50 - '55.1 frame. (I say '50 because it has hydraulic shocks instead of lever action shocks but a '47-'49 would probably work, too)
