2 reasons;
Because the Nova's shape in '68 till the mid 70's was the same with little change. Same for the Duster.
Chrysler corp needed a car to compete head to head with the Nova, in 70 they came out with the Duster. To the non-car guy/gal, there extremely close in looks. After all a non car person dosen't pay that much attention to cars, they look the same. It's just a car.
Fast foward many years and the differences that were slight are non existant to them now. Memories fade and the car is a simple reminder of things they can barley remember. After all, the 60's and 70's were good on the partying years.
