i finally got hold of a digital camera and wanted to post a simple, engine compartment locking device. see photos
http://s67.photobucket.com/albums/h298/1951otter/ the other shots are of my under pass bed gas tank, 16 gallon w/ the old cab filler turned 180 and welded to a plate. this mounts to the passenger side, in front of the rear fender, below wood skirting. there is room for a 2'' hose to connect the filler spout to the tank inlet neck.