http://www.musclecarclub.com/musclecars/general/musclecars-dealers.shtml has a good write up, I touched on this in the Mr. Norm's Hemi Dart entry, and forgot Berger Chevrolet, Royal Bobcat Pontiac, Dana Chevrolet, Saddleback Dodge, Berger Cherolet, Motion Performance, and Fred Gibb Chevrolet.
Gibb was in the know about the COPO ZL-1 camaro's and sold most of them, Royal Bobcat is mentioned in another entry for the GTO they brought to the Musclecar shootout of factory or dealership muscle. the link above has a complete description and is much better written than I could do.
