How to cut out rear wheel wells (radius wheel)

I had bent the conduit around a truck tire I had laying around
that was a couple inches taller than the tires that would be used on the car. If the truck tire is 2" taller than your slick you will have a 1" clearance all around.
Take the measurement from the center of the truck rim to its
outer tread and transfer this to the quarter panel to get your height. The car must have all of its weight on the suspension
or leaf springs for this to work properly. Just measure from the center of the axle up.
You can also take the same measurement and mark the quarter panel ahead & behind the center of axle to locate your
forward and after so the tire will be centered in new opening.