At an impasse with rear wheel/tire fitment

Hey guys:


I just finished installing new rear springs and shocks on my '73 Dart Sport with it's original 7.25 rear.

When I installed my wheels and tires, I found the front inside of the tire rubs the leaf springs. They are 255/60/15 tires on 15x8 rallyes with 4.5" backspacing.

So, what are the options here?

1. Same tires on 15x7 with 4.25 bs(that's the only other size 15" rallye that would look good on the rear that I'm aware of)

2. Less tire on the same rim.

3. Spacers( I installed 5/16 spacer and it clears the spring, but not enough stud length. I know everyone SAYS they had plenty left but there is NOT). Not crazy about spending time and effort installing longer studs on that temporary rear.

I can't spend the amount of money required for two new tires or two new wheels to make a guess, so SOLID recommendations are a big help:). Not sure why there is so much variance between vehicles anyway..some people have my size combo and it fits, some like me have it and it doesn't come close.

Thank you.