I just got my hands on GTM Serial #4. The car came with no glass or louvers but looks to be in good shape.

1. Are any glass pieces of the GTM Gen1 Flat? I ask because i know a shop that can make custom flat glass for windshields.
2. Does anyone still make the rear quarter panel scoops? Maybe I can just make them myself if I have to.
3. How hard is this car to register in California from scratch?.. I read a few forum posts from early 2008 but nothing recent.
4. Did the frame tubing size ever increase in diameter from any build or update?
5. How do people deal with foggy windshields?