In reply to pinchvalve:
Having a lot of familiarity with accordion's Camaro, IMO shocks are pretty much necessary if he intends to autocross it, especially with sticky tires. The shocks wore out a long time ago, and the car's handling is pretty horrible.
Camaros also had junk shocks on them from the factory, and couldn't handle the stock springs, much less any of the popular aftermarket lowering springs you would use for handling. I'm no Sam Strano, but my Camaro felt like a totally different car post Koni's. Accordions will be even more dramatic.
Here is my .02 on modding, based on my experience:
1) Shocks (Konis, Bilsteins. Even low mileage stock replacements will be a HUGE improvment on what he has now.)
2) Bigger front sway bar. 32mm was standard on the SS / 1le car and WS6 Ram Air Firebirds, and will be a good cheap replacement for stock. Budget permitting, look at the Suspension Technologies 35mm solid bar (I have this one, no complaints), or Stranos hollow (36 or 35mm bar - I can't remember). You can go with a bigger rear bar to balance out the handling, but it isn't essential.
3) Hold off on the C6 brakes. Your car has the same two piston PBR calipers that the LS1 car did, and should be more than adequate for autocross or occasional track use. Save your money right now, and put some good brake pads in the brakes that the car has. I felt like my stock Camaro brakes were pretty good until I crossed the 400 rwhp mark. Now I'm running a Porsche 996tt based setup.
4) Seat time, seat time, seat time, and go from there.
Also is a good time to drag out a rule book and figure out where you intend to go with the car and plan accordingly.