Re manuals, I have both a 1973 FSM and the late Carl Munroe's book (he passed away in 2012). However, I had to dig them up since, like so many things of mine, they got stuffed in some obscure place and were not readily at hand.

The FSM flow diagrams are IMO a bit better than Munroe's book. The '73 FSM TF-727 diagram shows the '71-up version (obviously), but I believe the TF-904 flow diagram shows the same as the pre-'71 since it doesn't incorporate the flow control valve / part-throttle circuit.