Time for new wheels and tires

My wife and I just picked up a 72 Demon that currently has drag tires on it, with the fronts being only 4” wide. We need to replace all 4 tires with radials. I was looking at a few members rides and combinations and am in need of direction on how to find the right combo for us. We like the look of 14” wheels up front and 15” wheels in the rear, but I’m afraid of them rubbing. Is there any way to measure exactly what the tolerances are on the car? (Posted picture is just for an idea of what it looks like currently but I’ll get a better shot tomorrow of it from the side)

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5 Lug - Wheel / Tire Combination Measuring Tool Gauge * Fitment Tool Gauge | eBay

This works well