The Stovebolt Site Forums The Parking Lot Tons 'o Fun One ton Rear bumper questions, 1947 thru 53 A D Trucks.

A rear bumper was an option on the 3800 series trucks.

The rear frame widths on the 3600 and larger trucks was 36" with the exception of 6702 and 6802 chassis.

I do remember seeing a part listing for that had the same brackets and bumper for the 3600 and 3800 truck.

With that being said, a 3600 rear bumper would be a direct fit.