Wheel Fitment and SBP – to – BBP, Lessons Learned (1969 Dart)

"Rolling out" the fenders? I hadn't considered that. You mean some way of pushing the sheetmetal uniformly outwards?

Yup. I had a big wood closet rod dowel, and a jack, jack the car up to fit the dowel above the tire and wheel lip, heat the paint with a heat gun to keep from cracking, and then lower the car a bit, so there's just a bit of pressure between it and the tire on the dowel (or use a baseball bat) and then roll uniformly back and forth and it moves the lip out.