I'm jealous as your '75 manuals are almost mint compared to mine! That's a good point you raise about yours being a very late '75 build in that it has some of the '76 changes. Does your '75 have the foot parking brake or still the hand operated one?
It is hand operated.
I want to do a little study of changes vs build dates. Gonna get a list of them together and probably start a thread to get some good input. Just want to pick several key ones so I don't make it too complicated. That seat belt interlock about drove me nuts any time I tried to follow a circuit in the 74 book. I am so glad that was never on my car.