Modifying front fenders for tire rub..?

I put a pair of 15 x 7" big-bolt Rallyes on the front of my '70 Duster with 215/65R15 tires and they rub the front edge of the fenders a bit. What's the best way to go about modifying the fender so they'll fit? Can I bend them or is it best to just cut the corner off with a cut-off wheel? Not much needs to be taken off, maybe 1-2" tops.