Ah the often ignored GLH, I love those as well. Get a GLH-T then add the "SLH" brake package, and a manual boost controller!
I had Several L-Bodies, and finally got out of it all when they all started hitting the crushers in the local yards. My favorite was a Shelby Charger Turboized Rampage.
As for Crossfire in autocross, how hard on tires is it? I will not be buying special tires/wheels for it, but don't want to significantly wear my daily tires. On my S.C. I really didn't car, and hammered the hell out of it, even snapped the lower front motor mount on a down shift, that car was for driving as hard as I could. This car for me is for driving nearish the limits, but not to the point of abuse.