How to roll a fender lip?

I'm sorry to say that even though I did all the measurements and mocked up my rear end, now that I have it installed my offset is wrong. It's clear I will be rubbing my fenders once I set this thing down.

DSCN0588.JPG

I'm working on a 69 Dart, original A-body 8-3/4 that I converted to BBP. And there's the rub. HAHA. Really, there's the rub. I crack myself up, but I digress...

The rear tires are 245/60/15, on a set of 15x7 Wheel Vintique series 63 steelies which have a 4.25 offset. But when I ordered the wheels, I didn't know going to BBP from SBP would add to the overall width of the axle, and wouldn't you know it that 1/4" difference on each side is exactly what I need to clear the fenders.

I'm evaluating my options. As I see it, I can roll the fender lips, but I have no idea how to go about that other than taking a pair of Channellocks to them. If there is a good way to go about this, I'd like to know what that is.

The other option is to get different wheels. I could go to a 235/60/15 but I don't want to do that - I like the 245's. I really like the steelies so I want to stick with them. Wheel Vintique makes a 15x8 wheel with 4.50 offset. According to my way of thinking, that should work but I'd like to hear from someone who knows more than me - which is just about everybody. The width of the wheel shouldn't affect the fit, for my problem it's the offset and the profile on the tire that are the pertinent factors, correct? Looking for some help from @72bluNblu for sure.

To quote RRR, thank you and drive through.