I've been waiting on you to do this for quite a while now and it's looking awesome! I'm really looking forward to watching this build come to life.
As for ref pictures... I happened to get a lot of pictures of the sister car (Car #4) at the Porsche Rennsport Reunion in Daytona, Florida earlier this year. When I return from my business trip next week I'll see what I have and send them to you.