When gasoline was cheap and the highway speed limit was 55 MPH, few considered the low numerical gear ratio's GM offered. Didn't want to give up the 0-60 times! But without overdrive and $4.00 a gallon gas, these ratio's give an old Pontiac a chance to drive 75-80 MPH and get decent mileage. 20.6 is just outstanding. My daily driver Jeep Grand Cherokee with a inline 6, port fuel injection and overdrive gets exactly that on the highway and 18 in the city. Enjoy your car driving it whenever you can. I am just starting to drive my 62 Catalina whenever I get the chance. Won't get that gas mileage, that's for sure. The 2X4 AFB's use fuel like a torpedoed tanker.
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