Losing rear wheel lip for fatter tires??

Hey Guys,

I just minitubbed my 71 scamp and am soon moving in the springs as well...I want to fit as wide a tire as i can in there and the next thing i want to do is to remove the lip that runs along the rear wheel openings...question is how do i do this? That lip is a seam of two pieces of metal so I am not sure what i should do....should i cut it, should i bend it, etc? If you guys have done this before please share how you did it and pictures would be great too.

Thanks alot:-D