what size front tires on 73 duster with 325 /50 r 15 on the rear

leblanc said
215/70 will likely rub but a 215/60-15 should do the trick or what I run on my Dart Sport which is just about the same car 205/70R15 on 7'' rims.

205 70 15 on 5 1/2" prostars here -----wish they were taller but not exactly a priority .