I have a sheet for my 67 R/T. Found three in a '67 GTX once, one for the car, one for a hemi car and one for another 440 car. Have had three other R/T's with them, had a couple 67 GTX's that didn't too. I have a friend with an original '67 GTX convertible. We pulled out the back seat and found two, one for his car and one for another GTX convert! It's hit and miss just like every other Mopar.