From working on the 1500 ram line I can tell you that if your truck is at paint, then it is nothing but a shell of a bed and cab with doors (no frame, nothing). After it comes out of paint the bed and cab get seperated and go off in thier opposite directions. Then the doors get door handles put on and the doors come back off of the cab and go down another line to get outfitted. The cab then starts getting outfitted itself (dash, electronics, weather stripping, carpet, seats, etc. ).
Good luck,
Dave