[thePill]

If the Z28 is to be reverse engineered from the Camaro GS in Grand Am, here are some disqualifying factors that have to be taken into consideration. This is kind of a long post but the "QUOTES" are taken from the 2011 Grand Am Rule Book and can be read in its entirety here: http://www.grand-am.com/news/index.cfm?cid=13517&rr=no
Be sure to scroll down to the Continental Tire Sports Car Challenge section

First, the minimum production rate.

Eligible cars will ordinarily be those described in manufacturer’s catalogs, produced at a
minimum rate of 500 units per year, and available for purchase through normal dealer outlets 30 days or more prior to competing in an event. Exemption from minimum production requirements must be approved by GRAND-AM.

and...

3-3.1 GRAND-AM may use any legitimate forms, publications, original components and vehicles describing the production OEM (original equipment manufacturer) specifications of the eligible makes and models in order to verify compliance with these regulations.
GRAND-AM may require a competitor to furnish factory specifications prior to competing.
3-3.2 GRAND-AM may establish specifications that are not per the original manufacturer specification.
3-3.3 Each car must conform to the standard configuration as delivered to U.S. consumers by the manufacturer except where these regulations allow or require modifications.

The CTS-V or ZL1 braking system cannot be migrated over to the Z28. Those braking systems are for heavy vehicles anyway and since the Z28 is aiming to be at the SS's weight, they would be useless. The ZR1/Z06 Carbon Ceramic might be eligible but only the disc, not the calipers. Most of these Grand Am cars use smaller disc brakes over the stock. I have a simple formula that can determine a vehicles required braking system requirements.

GRAND-AM may allow a brake upgrade for specific models. If allowed, only one two-piece (split into two halves) caliper of aluminum alloy with a maximum of four pistons and two pads per wheel permitted.

It is safe to assume that the engine will not be forced induction of any type. This actually takes a lot of pressure of the independent teams to do so.

7-6.1 All forced induction vehicles will be assessed an additional fee when registering for the season. This is to offset the cost for data collection equipment for these cars. Forced induction teams will also be required to purchase (from GRAND-AM) and install the following sensors:
ST453 Boost sensor with DSP ST543 IR Lap Time Rx
The boost sensor may be collected by GRAND-AM at any time to verify calibration and accuracy. Replacement for sensors damaged in use will be the responsibility of the team.
The data acquisition modules will be randomly assigned by GRAND-AM. Only a GRAND-AM official may access the information on the unit. These units must be returned to at the conclusion of each event.

Engine specifications:

7-8.1 Engine management systems may be replaced with non-OEM systems with GRAND-AM approval. Effective 01/01/08 all GS and 05/01/08 all ST Continental Tire Sports Car Challenge cars that choose to use an aftermarket ECU must use the GRAND-AM specified ECU and wiring harness. Spec ECU and wiring harnesses cannot be modified in any way.
7-8.2 The following components may be tooled enough for balancing only - pistons, rods, crankshaft, harmonic balancer, flywheel and clutch.
7-8.3 The lightest rod and piston must remain unaltered.
7-8.4 The crankshaft and harmonic balancer may weigh no less than the OEM specification.
7-8.5 Aftermarket pistons may be used provided they remain identical in weight, dimension and form.
7-8.6 Allowed to overbore block up to .030 maximum.
7-8.7 The oil pan and oil pick up may be modified (not the pump)
7-8.8 Engine oil Accu-sump system and valve is permitted.
7-8.9 All pushrod engines may use aftermarket blueprinted or adjustable length pushrods, provided
they are of the same material and configuration of the original.
7-8.10 Other items that may be replaced include cam gears, sprockets and chains. 7-8.11 The airbox and air filter are free on normally aspirated cars unless otherwise specified by
GRAND-AM. Ram air induction is not permitted.
7-8.12 GRAND-AM will provide restrictors when required. Teams will be responsible for gaskets and bolts to attach the restrictors. Return of the restrictors is mandatory following each event or fines will be imposed.

Here is the exact Camaro requirements and regulations page.