Wiring gremlins
The 69 link was fixed later in the thread. Here's the link. It's for a Dart, however, not Plymouth/ Cuda. Most of it should be same, unless you have a Rally dash
[ame]http://www.abodyjoe.com/pictures/Misc.%20car%20info/69%20dodge%20service%20manual.pdf[/ame]
The 71 manual in that thread has no wiring, the "71 wiring" is basically the same as the stuff at MyMopar, and may not be entirely accurate
I guess what I'd do is make as much as you can samo as the 69, as that? is what your dash harness is?
The 70/ later alternator/ regulator wiring can stay if you want to use the 70 regulator, but you'll need a 70/ later alternator as well (two field connections)
The 72 manual at the start of that thread is also very useful "just to have:"
[ame]http://www.abodyjoe.com/pictures/Misc.%20car%20info/1972%20Plymouth%20Chassis%20Serv%20Man.pdf[/ame]