Hey Mel, I am building a 1930 Model A Brookville roadster. It came with a 4 inch recessed firewall, but since I am installing a BBC I purchased a Bitchin firewall (gave me more room) with front floor pans & tranny hump. Loved the bitchin fire wall. Now I will sell the Brookville firewall which has never had one hole drilled in it or anything mounted to it. Bitchin products fit excellent and are good quality not to mention excellent customer service!