When I was in the Air Force, in the 60s, we had tons of every kind of factory manuals you could think of. They had at least 10 manuals for each type of vehicle on base. They would throw the old manuals away, when the vehicles became obsolete and I scarfed up a bunch of 'em. However, I divorced my ex and in my rush to get out of Dodge, I left most of them behind. I don't know how many times I'd wished I had hung around just long enough to haul off those manuals!
Thanks again for your help. The sending unit cost $16 at NAPA, by the way.