MAKING ROOM!
I marked the Inside Body Sides using the Outside Wheel Wells as guides. I am mounting the BiG Deals Wheels Tires as far inboard as I can so I need a Lot of room.
I cut pretty close to those lines with a Cut-Off Wheel, then I used a Sanding Drum in a Dremel Tool to round out the Inner Wheel Wells.
Front-Side View...
Underside.
More Coming...