There are some very slight differences. I know there are some people that can tell you exactly what they are.
I am confident Mr Gaines understood the original poster was not building a D1 car, based on his previous requests and posts. Therefore, its a non issue.
As I stated before its almost always a non issue. That is why added the comments about the changes I believe should be made to judging. If anyone thinks show cars are built without reproduction parts, they are lying to themselves and I include D1 cars in that assessment