After JoeC mentioned that the SS427 badges seen on the Motion Corvettes were the same as the badge on the trunk of a 1968 Impala SS427 I wanted to see for myself.
Finally after a week of searching I found a rear view picture of one of these cars on a web site.
http://woodstock.uplink.net/~mikadink/rearview.jpg
Not overly clear but you can make out the SS427 badge is there.
Actually they are a very nice looking car in their own right