I have an '84 T/A without the WS6 package. I remember reading that besides the wheels and sway bars, the steering box is also different.

I have an opportunity to purchase a steering box that is described as follows:
This is a 2 1/2 turns to 1 quick ratio steering box used in the factory performance handling packagesout of an '82 Camaro Z28. Will fit 82-92 Camaro & Firebird.

Is this box different than the one I have?

 

Probably the same as the one you have. 90-92 hi-ratio box with stops for 16x8" wheels has "XH" stamped on cover. This is supposed to be the best one.Don't know gm part#.Hope this helps.
-Rich-

 

why only 90-92??
is the 89 box differnet???

thx

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89 Formula
96 Impala SS

 

I removed the original steering box from my '82 Z-28. I installed one from a 1986 IROC
The IROC box was a tremendous improvement.
Also keep in mind that the "wonder bar" will also improve your steering rate. It helps prevent any unwanted lateral movement of the steering box, or frame that it it attached to.

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82Z 305 w/comp 270 magnum cam,Edelbrock Performer RPM,Holly 1850-4,serpentine belt drive.TH700R4 w/B&M holeshot 2000 converter,& megashifter.1LE front brakes, 9bolt 3.27 w/1LE rear brakes.Aluminum driveshaft,boxed rear susp.poly everything,IROC swaybar+wonderbar. 70mph@2200rpm ASE Master Tech plus L2
also recently obtained a
'69 chevelle SS396 w/Turbo 400,3.31 posi,11.0 to 1, headers,etc. Latest project car,'86 IROC stock 305TPI hit on left side,but not too bad

 

The higher effort quick ratio IROC or WS6 box has 2.25 turns and came out in 1985 with the 16" wheel package. The 2.5 turn unit is the stock Z28 box. The ratio isn't bad, but the steering effort is just like any domestic luxury car from the mid eighties.

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1985 Yellow IROC-Z 5.0 HO, T-5 3.73 Torsen, 4 wheel disks
PFCM pads, GTA wheels, Koni yellows, B&M Ripper, Dynomax