1962 4x4 1/2 Ton Panel Questions

[1962 Panel]

Hello, new member here. Just picked up a 1962 4x4 panel truck for a project vehicle. It has a beautiful running 1966-1968 327 small block with a four barrel Rochester carburetor and "double hump" heads. The driveline is an SM420, divorced Rockwell 221 transfer case and Dana 44 axles (closed knuckle front). The front fenders, outer floors, floor supports, kick panels, rocker panels and lower front door jamb pieces are pretty much gone but the frame is great and the body is structurally sound including the wood rear floor. Anyway, one question I have is what is involved in doing a open knuckle swap in order to get disk brakes as well as the other advantages of the open knuckle such as strength and turning radius. Another question is whether or not the body panels from a '62 pickup can are the same as the body panels that need to be replaced in the cab area of the panel truck. I'm pretty sure they are but just want to confirm. Lastly, the manual master cylinder is integrated with the clutch cylinder so it doesn't look like a power brake conversion is possible without relocation of the clutch push rod. Any comments on any of these questions would be much appreciated.