Berger Z28/RS

[PG70]

Hello all, I am new to this board and would like to thank you for the education I've recieved just reading the posts this evening/morning.I am the new owner of a 1970 Z28/RS with a chrome by Berger insignia on the rear fascia.I purchased it back in June and to be honest I did not have a clue as to what a Berger Camaro was until one day when I had the car out at a trim shop to get an estimate on interior repairs and some one asked where I found the car(how embarrassing this was).Now I need to educate myself about the car.I'm preparing to replace the rear frame rails, they are pretty well rotted away forward of the rear axle.Getting any information about the car has been difficult, I spoke with a gentleman at Berger Chevrolet in Grand Rapids who worked there since the early 70's but he couldn't tell me much.Where can I find information about the car?Any help is greatly appreciated.Thank You.