[Oldsmaniac]

As already said a non AC car would most likely have 3:23 gears while an AC car would most likely have 3:08 gears.....you cannot tell what gear you have or had because of maximum speed....A lot of other things would come into play including engine tune at that time and carburator condition, etc, etc, etc. I had a 66 Delta with 3:23's that would bury the needle but who knows how fast the car was really going?....I believe 3:42 gear was the most you could get from Olds, however the rear used in 65 was really a Pontiac unit and more aggressive ratios I believe could be had from Pontiac for the full size cars.