1968 barracuda fastback rear fan?

My brand-new fastback 69 cuda 340 had it (I didn't order the car, just purchased it off of the truck), but my now owned 69 cuda 340 fastback doesn't have it and it has the deluxe interior where my first one had the regular interior. It is totally useless because it only blew cold air from the trunk area across the back window and never defrosted the window in a timely manner. Funny too is that my present cuda has the rare carpeted side panels and my original one didn't. So I don't know if you couldn't have the fan with the carpet.