I’ve used the year one repops from M and H for 70 RR. They work fine. The only problem is that it is actually for a 70 Charger. They claim it’s based off the original replacement harness that mopar sold over the counter to fit ALL 70 b body cars. You have to tape up the extra wires under the dash for the 70 charger headlight relay. I’ve cut the harness open and removed the wires on two just because I’m picky.