These were being used on a 1968 18 spline trans in a 1967 Belvedere. I personally have never seen a shifter with a straight reverse arm, and can see no number on it. The rods and levers are oem style, not what comes in the comp plus kit.
Also the stick. No number on it that I can find either. Could it be an original 1964-65?
Also the stick. No number on it that I can find either. Could it be an original 1964-65?