Quick Ratio vs Standard Pitman and Idler Arms

Factory manual steering boxes were either 24:1 or 16:1, the fast ratio boxes were 16:1 and were offered only on A-bodies from ~1965 to 1969. The fast ratio manual steering boxes had standard length idler and pitman arms, the ratio was from the worm gear inside the box.

The only cars that got factory fast ratio pitman arms were the TA/AAR E-bodies, and that was a 16:1 power steering box with a fast ratio pitman for a final ratio of ~12:1. But again, that was a power steering set up.