Shorten A-body axle or widen well

3 lb Hammer or rubber mallet will hopefully give you enough room. First get it started by beating it up, then try to beat it as flat as possible.

I had a blow out on the interstate years ago because I didn't do this before I put wide tires on my 75 Dart Sport. After a few heavy bumps in the road, it cut the side wall right out of one of the tires. Limped it to a local tire shop, purchased new tires but told them they had to let me in the garage area long enough to beat the fender lips up. Never had a problem after that.