I've thought about something like this to keep the fir needles and leaves out for part of the year, but need to get creative with the installation give the lack of overhang lip on the Flareside box. The firesale price is pretty close to making it worth trying, thanks for the link.
If anyone has made one of these styles of kit work on the short bed F/S, please pass your thoughts this way.
Sonoma County,CA
1982 F150 Flareside XLS
NP435 4x4
351W Motorcraft 2150