Just copied from the ITCS posted at SCCA.com:

c. Suspension Control

1. Any anti‑roll bar(s), traction bar(s), panhard rod or watts
linkage may be added, removed, or substituted, provided
its/their installation serves no other purpose. The mounts
for these devices may be welded or bolted to the structure
of the vehicle. No suspension control mount or component
shall be located in the trunk or driver/passenger compartment
unless installed by the manufacturer as original equipment.
Traction bars used to control axle rotation shall be
one piece solid bar or tube. Heim rod ends may be fitted.

2. On those cars where an anti‑roll bar also acts as a suspension
locating device, the diameter of the bar may be
changed. Bar attachment and pivot points on the chassis
and control arms shall remain as stock, except as provided
for in these Rules, Sections D.5.d.1., and 3.

I can add, remove or replace any suspension locating device and the respective mounts. Looks pretty open to me. Hmm... de-coupled 3rd link:

http://www.unbalancedengineering.com/Camaro/TA/

**I am not referring to the trailing arms, shock or spring locations being altered. Those must remain stock.