After I take She Who Must Be Obeyed to the hairdresser I shall scan the US Government contracts listing for all Chevrolets and post same for inspection.
However in the meantime, here's information for you to check already made available:
http://clubs.hemmings.com/clubsites/...ruckindex.html
http://clubs.hemmings.com/clubsites/...tarychevs.html
http://clubs.hemmings.com/clubsites/...chevindex.html