[El Sol Infinito]

I know these cars are supposed to be riding low, but I wonder if maybe my back end isn't scraping the ground more often than it should.
Can anybody tell me on my '64 Convertible, what is the distance from say the center of the rear wheel hub to the top of the fender supposed to be? I'm going to give this measurement to my shop as an acceptable range when they redo my rear suspension.
Anyone that can help, thank you very much.
Bob