Making room......sounds painful
Tape poster board to fender.
Cut excess and crease fender curve.
Slide it back 3" and retape it.
Take cutoff wheel and follow the curve.
Clean edges with flap disc and paint the edge to protect again rust.
Fender well is widened while maintaining the exact slope of the OE well.
You know you did it right if you can't even tell the well is 3" wider