Haven't got to that yet but many possibilties come to mind. Pockets on the frame with stakes on the body pinned with quick pins, Have a winch mounted between the rails just behind the cab pull the bodies on with the winch Pin them. In the case of the ramp body put a pulley system to use the same winch to pull the cars up the ramp. I'll give it a lot more thought later after the old girl rolls on the P-30 axles. Got a price to move the old girl home today. I figure it's money well spent. I'm heading down into MA Friday morning to drive the donor step van home. Soon it will all be here. Maybe I can get a jump on spring.