Ive read through all of stephen's posts, and he mentions a few times a wire mod needing to be done to install them. what wiring mod needs to be done? not just in the rear, but under the column?

 

I do not have a camaro but Bigbadlou posted a link in a wanted thread I started in 2011. Search Stephen's STS units started by me. Then go down to post 27 and click on the link in blue and then at the bottom of that page is a link to convert regular firebird taillights to GTA taillights. It says it works for Camaros also. The links are still good. Last white wire under column connects to the light blue wire from brake switch.