My new 75 Duster stocker, let the fun begin.

Cool! Where is "Edson"?
You may be in a "hornets nest" in Stock, probably between E/SA and G or H/SA, but that's what the car appears to be set up for (9" tires. Like the Holeshot Wheels. They are kinda local to me.). SS may problematic with the higher maintenance & if you have budget concerns. But best of luck either way. Looking forward to more pics & info.