Reread my reply. The V-8 RS uses the same pieces that are on your car. You don't need to replace that stuff. It's optional. Consider the Z-28 parts to be a handling package. There is nothing that is anymore heavy duty than what you already have.

Now, that said, short of the rotors and calipers that you can get new at your local parts store, the control arms and spindles should be available at a local wrecking yard. I'd still replace the bearings, seals and ball joints with new as well. If you are building this car to go fast in a straight line, this would be a complete waste of time and money. And all the springs from the lowliest 4-cylinder car to the '92 Z-28 all use the same springs.

In fact, if this car would be built to drag race (track only), I'd toss the sway bar and run without. For the street, the Camaro came with 6 different sway bars from 27mm to 36mm in size. Yours is the 34mm.

The rear end for the Camaro is the same basic piece for all models. The only difference is the '91 & '92 were available with rear disc brakes. This is a waste of money as well. The drum system will work just as well as the discs and they weigh less. Buy for the gear ratio you want, not because it's a V-8. They all use the same housing. Buy a better torque rod to control the wheel hop.

As for the trans, let your wallet be your guide, but a 700R4 would be a better choice than a T-350. And with that trans, you may be able to keep your original driveshaft.