I have had several slant dusters, most were auto, and with GOOD engines driving strickly back roads at 50-55, I figured a good 20 mpg. upeers toward mid twenties, BUT it took a good engine, inc carb, dist, tuning....
I bought a 67 cuda 4 speed stock rebuilt 383 thermoguad back in mid 90's, it had been totally rebuilt( by an engineer for an oil co) that road raced another cuda. I drove it back to Mo from Ca, I remember it had a 2:94 8 3/4, and I averaged 18 on that trip running 60-70, sometime 75 across 2 lane Nevada........ desert, mountain etc.... BUT it was a GOOD engine!
