There was a special manual box that was very fast. I have a 67 SS350 with manual steering, long pitman, shortest outer arms, it has just over 2.25 turns lock to lock.!
I've read that the Z/28 when ordered with N40/ N44 fast Power steering either came with steering that was even faster, or optional "Special fast" steering.
Below is what was available for 1969 N40/N44 Camaros. What might be missing is, that regular camaros got "Standard" non-variable PS probably 17 to 1, then ratio 1 was the regular N40/N44, number 2 was a Z/28 ONLY option, - the SPECIAL FAST ratio. Does this sound right? I think GM only used variable ratio steering boxes as optional equipment, not standard equipment.
1. REGULAR VARIABLE POWER STEERING 1969, N40-N44,1969-16.1:1 on center, 12.4:1 off center, 15.5:1 overall
2. N44 FAST VARIABLE RATIO POWER STEERING N40-N44, 1969 16.1:1 on center, 12.4:1 off center, 14.3:1 overall (Z/28 only?)