Weld Pro Stars or Cragar wheels

I've got a pair of Cragars in rough shape but they aren't the backspacing you need. They're 15x10 I believe with slotted holes to accommodate either 5x4 or 5x4-1/2 bolt pattern but I think the backspacing is only 3-1/2" if I remember right. I don't know if it's worth it for you to cut the centers and relocate or not. They were on my parts car when I bought it. I used them to roll the car around and have no use for them now.