Well my time on one of the display stands at Summit Racing ended this morning, after stopping to fill the gas tank I decided to spend the day cruising around before taking the back tires off to swap them out for a set that are a little shorter. I loved the 390/40R17 but they rubbed when I took a sharp turn the opposite way of your typical Nascar race. I chose a set of 345/40R17 Toyo Proxis which are about 1 3/4" shorter overall but with the same width. It will solve my rubbing issue I might have to adjust my ride height some to get my stance back.
On a side note the 'Cuda is getting a correct date coded set of 15' X 7' 2944450 wheels and Goodyear Polyglas F60-15.