Father-Son 1974 Duster Project
I dragged in a 73 Duster the other day, and went out and looked where the Voltage Regulator was. It's a V8, AC, PDB car, and the V Reg bolts in the same place as where BKD's pic shows it on the manual brake car. The bolt holes are in the 2 little raised ribs. If yours fits where your bolt holes line up, I'd put it there. It would be a lot easier to change if it ever goes bad.