Optimal brake pedal ratio?

[chevyrestoguy]

I am playing with changing the brake pedal ratio on my '64 due to the fact that it no longer will have manual drum brakes. I converted to all 1979 Chevy C-10 suspension components, and the brakes will now be power discs.

I did some calculations on the stock pedal ratio. The pedal length is 15.50", and the distance from the pivot to the pushrod attach hole is 2.25", making the pedal ratio 6.8:1. That's too much ratio for power disc brakes.

Because I'm going to a power assist system, I need to lessen the brake ratio. If I increase the distance from 2.25" to 3.75", the pedal ratio goes down to 4.1:1, which is similar to what the factory uses for their power brake vehicles.

It would be as simple as redrilling the pushrod attach point 1.5" lower than the factory position.

Has anybody tried this (re-drilling the pushrod attach point), and what results did you get?