[antediluvian]

Thank you both!.  The McQueen car and the 911 are 1 mm different. Hmmm, not much really.  I am thinking that trimming the TR6 body 2 mm at each wheel well might get me there on a 911 chassis. Excellent. I will look for a used 911 car to mmmmm modify! Or, maybe when I mold the TR6 body, I will stretch it where the doors are.