Sweet rendering!! I have a 72 GTO that happens to have an enduro bumper in excellent shape. LOL!! I always wondered what I wanted to do with the car and your rendering shows me it can be made out to be a sweet car.
It brings back memories (very faint, I was a toddler) of a '71 LeMans my dad had. Most of what I remember is from pictures and stories; he picked it up as a beater while he was stationed in the Philippines with the Air Force, then had it shipped back to the states. It wasn't a pretty thing, mostly shades of primer, but he had dropped a 455 into it with a turbo 400. He was forced to sell it in the 90's when the recession hit though. Who knows where it is now. I haven't looked at the pictures of that car in years... I'll have to ask him about them.