Help with Rallye harness replacing standard harness 70 dart

No, if you read my OP I am going from a 70 dash/harness to 70 Rallye and rallye harness. I'm just noticing the differences in wire colours per harness and concerned that it will cause problems? Thanks for any thoughts.
Well I read it and you didn't say, but you mentioned 74 later on. "A guess."

Like I said, tho, you need to go wire to wire individually. Wire colors did change here and there I'd think 70-70 would not. But follow the manual and go by the PURPOSE as I said AKA the oil sender wire, the temp sender, whatever. It will help if you would post a photo of of the rear of the cluster you are using. Then ask questions about whichever wires

What do you have for service manuals/ diagrams? That really is the "thing."