Bolt in 4-link or mono leaf springs

Years ago I installed QA1R single adjustable in the front and QA1 doubles in the rear. I’m never lifting the tire a foot so the singles are fine for me. I would recommend spending some money on a good set of doubles front and back. Ones that can be rebuilt and revalved. You will cry a bit, but they will be worth it. My cars does nothing violently, but I’m still out of adjustment with my current shocks. Viking or AFCO. I was asked by another racer if I thought the money spent on a double adjustable shock was worth it. ABSOLUTELY, and you’re going to hit everything harder. I was able to tune the rear suspension to keep the bulge in the sidewall even throughout the launch.