I know, 2 year old thread, but interesting. Does anyone know the correct measurements, or how to ID a factory E/B body unit? The reason I ask is I had a fellow here yesterday buying parts for his 71 Charger, and when we were looking through the sheemetal he spied my sunroof... I got it in a large parts purchase from an E body guy. He said it was from a Challenger he parted years ago (like 79-80). I an take a boatload of pix no problem. This guy wanted to buy it, and asked me to think up a price... I have no idea.