If I remember right all 69 power steering used the same variable ratio box. The difference to get fast ratio, came mostly from the steering arms. Good reading on Dave Pozzi's web site. Search here there are a number of links.. would cut and paste a link if my phone had that capability.
Hey Tom my understanding from the guy I brought my steering box and pump to says that most base camaros got a variable 4. something lock to lock worm gear. The next level was a 3 & 1/4 variable and or constant lock to lock, then a close ratio constant lock only 3 & 1/8 turn unit, which would be the close ratio worm gear set up.
Please correct me if I am wrong.
He also informed me that my pump and my steering box are stock OEM, however he thinks that at some point the worm gear was changed to 3 & 1/4 worm gear instead of being replaced by the stander 4 turn unit. So I am planning to rebuild with the current set up of 3 & 1/4 turn to turn, to match my stock pitman arm.