Unfortunately, I don't have all the time I would like to have for the hobby. But I'm sure I'm not the only one with this problem ;)
Which leads me to the 74 wiring diagrams. I would, but it's very very time consuming do redraw, reshape and colorize every single line with Adobe Illustrator. The other thing is, I found a lot of discrepancies and differences between the diagrams and the actual harnesses. For example, they marked the wires with tracers with a "*", but they don't list the tracer color. So, without having the original harness right next to you to check every single wire for correctness, it's impossible to draw accurate diagrams.