it's a 91 z28, i can't remember the suspension rpo but it was the middle one, not soft but not the stiffest. the box is still in the car and i don't see a Z or X or anything stamped on it. where do I look? would this be the quick ratio box since it came from a car that had 16" wheels stock?

 

to answer my own question, yes it does have the better box, after i pulled it off i saw the Z stamped on it under some crud

 

The Z is not a dependable sign that its a quick ratio box as the stock unit I pulled off my bird had the Z but was not the WS6 box. The only real way to tell is by counting the revolutions of the output shaft when the pitman arm is turned lock to lock.

 

it was 2.25 lock to lock