65 Dart front tire and fenderwell header questions

I remember waaaaay back in the day, a guy with an Early A Dart at Greer Dragway ran 15" pizza cutter Centerlines with 5/60- 15's, which were basically VW Bettle tires. He had a 340 with fenderwell headers and it seemed to be fine. Maybe see if you can find a modern tire the same height as that and see what you think.