In 1980, I bought a 70 Hemi Challenger from the OO, who I worked with. 4 speed, 4.10 Dana. He stopped daily driving it in 1975, but told me prior to that he piled his wife and 2 kids in the car one July and drove from the Chicago area to California and back during his annual 2 week vacation. Magazine article says they had to stop for gas roughly every 170 miles.....with a 3.23 gear. I'm betting gas stops were considerably more frequent than that in the Challenger
