Some years ago, I had reason to frequent a local place that was specific to older Fords. It took several trips to get what I was doing settled, and I went in there several times.
During these trips, I'd noticed that there was a FoMoCo publication in one of the display cases---one of the manuals Ford printed to go with the SOHC FE engines when they were first being sold. I'd had one long ago, but you know how things go missing.
I went back in the store and asked the counter guy where the 'Cammer Manual' had gone to. (It wasn't where I'd seen it.)
He immediately got 'in my face', stating rather belligerently that they only sold auto parts and I'd have to get a 'camera' manual somewhere else. He then went in the back to keep from talking with me any further.
I left, thought better of it, and went back in and quietly asked for the manager. We had an extended discussion. The gist was, "You can't get good help."
KS