This topper was installed on the 1974 GMC Sprint (GMC's version of Chevy's El Camino) when I bought the car. I'm in the process of making the car drive-able and I just chose to not put the topper back on it. I knew the guy who bought it new and had the topper installed shortly after he brought it home. Please text or email. If you need to call, please leave a message as I don't answer calls that aren't in my contacts list.