FYI..1st gear ratio for 1964-65 4 speed transmission was 3.09:1 while the 66 1st gear ratio was 2.66:1. That 2.66:1 1st gear start would have had 225 6 cylinder grunting a bit to get moving.
I have a 65 and 66 4 speed cars, personally I love the 3:09:1 first gear found in the 65 trans better than the 66. A lot less wear and tear on the ole clutch even with the 273 HP.
