Rear leaf spring recommendation for 67 Barracuda

If it were me, I would contact someone at either ESPO Springs and Things, or Eaton Spring. I am by no means an expert on leaf springs, and don't want to be a "Keyboard mechanic". I just know that they offer different springs with various spring rates, and I also know that you can order +1", and +2" springs to give you more height in the back to help clear your tires.

If you want guidance on what springs, why not go to the experts. I have heard a lot of good things about both of those companies.