Gear ratios and driveability

I had 4.56 gears with 245/60/14 tires in my 68 dart with 340 and 727. I believe it was 3000 rpm at 45 mph. Way over 4000 rpm at 60 mph. I drove to the track once that was 130 miles away. It was a very long drive. I got pulled over by the popo for going too slow. Kim