I have 67 through 74, and the 1978 versions, complete with both electrical and vacuum diagrams. I need all of them for my work, though. Every once in a while, I browse e-bay for the later years; the prices seem quite variable. Nevertheless, these large books are some of the best original source information for wiring and vacuums from Ford.
I believe these series started in 1967, and I have never seen anything earlier.