Is There a Car With an OEM Quick Ratio Rack?

[Rhino]

Since you're looking to retrofit into an existing chassis it's not quite as simple as choosing a ratio and making it fit.
Two measurements you'll need to know when researching a rack. The inner ball joint to inner ball joint, and the linear throw.
It is absolutely crucial that your inner ball joint to inner ball joint measurement works with the track width and other suspension components you have in mind. It's pretty difficult to modify an OEM power rack so you're usually stuck with whatever you find.
Where the throw comes into play is your turning circle. When planning my suspension, I found the 4th Gen rack worked ok, however didn't provide nearly the throw I needed to attain a near stock turning circle. I can't speak for putting one in an S-10, however most people who retrofit them into 1st Gen Camaros are rarely happy.

As was previously said, the fox body racks work well for quite a few installations. I ended up purchasing a 15:1 AGR rack for a late fox.
The early SN95 racks can also be a pretty decent fit. Similar IBJ to IBJ as the fox, with a little longer tie rod ends.

A rear steer rack will throw the opposite direction of a front steer rack. If you visualize what needs to happen with the steering arms you'll understand what I mean. When turning the wheel clockwise on a front steer rack, it will move the arms to the right. On a rear steer rack, this would move the arms to the left.



With all that said, I (personally) wouldn't retrofit a rack into an existing suspension. There always seem to be too many compromises. In this situation, a well designed box usually trumps a rack in both ease of installation and performance.