Thanks for the replies. I compared the body in the new kit with my built model and it looks exactly the same.
I'm guessing I may have had some tips from the Internet to change things on the model to replicate the real stock car because there is nothing in the instructions to do this. It was awhile ago and I'm getting older so it's easy to forget. I was surprised I did a decent job before so will have to use my built model as a guide to build another. btw, I got some nice decals from Mike's to do this one as the decals in the kit are a bit generic. Nice, but wanted a more complete version.