1970 plymouth duster rallye dash

Some idiot removed the rallye dash from my 70 duster, made sheet metal modifications and switched it to the standard dash. I am switching it back. I need to know what the difference is between a rallye dash wiring harness and a standard dash wiring harness is. I have wiring diagrams and other than the tach, it doesn't show a rallye diagram vs a standard diagram. So, what would i have to do to modify a standard dash wiring harness to the rallye dash?