Conversion to Rallye Dash

Good afternoon,

I have a 1972 340 Duster and recently picked up a 1967 rallye dash frame at a swap meet. I understand the key difference is the ignition switch being on the dash, I plan to weld this up. What is all needed to do the conversion? I know I will need the instrument cluster and wiring harness. Is there any difference between years of rallye gauge clusters and wiring harnesses? I am not extremely concerned with being correct for a duster as it never came with a rallye dash in 1972. I just want to get a shopping list together to make the switch this summer.