71' dart 28" x 9" Slicks

Same setup here in the Dart. Had 15x8 Super Tricks with the same MT ET Drag 28x9 Slicks. Those Super Tricks were 4 3/4 BS. Worked perfect with the 002/003 SS Springs since the quarter opening lip was above the center of the sidewall. When I switched to the Cal Tracks and the car got slammed in the weeds, I had to change rims. Went with Billet Specialties with a 5 1/2 BS and then used a 1/2" true billet spacer to give me 3/8" inch from the mono spring to the inside sidewall, and 3/8" from the quarter lip to the outside sidewall.