The steering box on my camaro is leaking pretty bad. I was wanting to get an IROC box from a junk yard because I am running 16's and I've hear these have stops that other third gen boxes don't have. I was just wanting to know if their are any differences in the feel or ratio of any third gen steering boxes? Is there any markings that tell the ratio or what it came from? Would it be worth it to try to fix the box I have? I have heard that you can replace a gasket somewhere on the box, but does this usually work?

A quick ratio steering box has a large W cast into the housing. You'll have to search the archives for actual casting numbers.

You can easily replace the seals. It's usually the input shaft seal or the sector shaft (output) seal that's leaking. Both can be easily changed however the output seal needs a pitman arm puller.

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and check out the race car

87 IROC-Z SuperPro ET Bracket Race Car
461 naturally aspirated Big Block

Best ET on a time slip: 11.242 altitude corrected to 10.89
Best MPH on a time slip: 121.52 altitude corrected to 125.89
Altitude corrected rear wheel HP: 497.9
Best 60 foot: 1.546

Racing at 3500 feet elevation but most race days it's over 5000 feet density altitude!
Member of the Calgary Drag Racing Association

87 IROC bracket car, 91 454SS daily driver, 95 Homebuilt Harley