Z-Bar question regarding hole under clutch rod post

Dano, Yes I'm aware it is "correct" according to Brewer's site, and I'm not questioning Brewers. But look at Jeff Alder's pictures in post #5. The hole is not there. I'm thinking maybe there was a use for it in '64 or '66 cars, but works for all 3 years. As best I can tell, there is no use for it in '65 A bodies.
Ill look at the other 2 I have Bob and compare. I know my Avatar car has an unorthodox spring under the z bar and the clutch pedal is so smooth it's like a hydraulic clutch.