I started out by getting a AFCO battery mount and I welded some tabs on there, BMR makes one for an F-Body but they charge like 90 bucks for them, the AFCO one is 25 bucks from summit, its the same box with out the tabs welded on there.
To make the car legal at the track you need a battery kill switch hooked up. I used a Flaming River Push Pull kill switch.
Pic with the panel installed
this pic was posted on CZ28.com 12SCNDZ made it but Ill put it up on here.