The wiring harness that you have to trade is the save for 68 rr no a/c
I do have a harness if you think you still need it $125. shipped
the difference between a a/c and a non a/c dash harness is a sub harness added to the dash harness
Year One sells the M&H Electrical Fabricators truly plug & play Harnesses @ www.wiringharness.com/ exclusively, there is also Evans Wiring Harnesses @ www.evanswiring.com/ , they are both kind of pricey but really good restoration products, good luck