My 72 RR?GTX . When you ordered the 440 in a Roadrunner in 1972 it became a Roadrunner/GTX. They were phasing out all the hi performance cars because of the gas crunch. So as a result very few bigblock cars were made. This was a 440 4 sped Dana 60 equipped car. I drove it for a few years after fixing it up, and sold it for $6500 in 1989 to finance my first house. I now know there were only a little over 500 produced in 1972 with the bigblock and the 4 speed transmission. Can you say rare? Jesus if I only knew how rare some of these cars were back then. It was too heavy to be fast,but it was fun to drive, ( 81/2 to 1 compression didn't help any)