The Stovebolt Site Forums The Parking Lot '60-'66 Trucks 1961 Frame Shortening

Looking for any information out there "How to shorten my 1961 Apache Fleetside Long Box Truck (X) Frame to a Short Box Fleetside"
There is information on how to shorten a 1963 to 1966 and newer truck frames, but not much on the 1960 to 1962 (X) Frames.
Can't seem to find any new fleetside shortbox panels for sale, so I may have to shorten them also.

Any help would be greatly appreciated.

Thanks,

Paul up in Edmonton, Alberta, Canada