Good thing you've decided against the S130 calipers, Aydin. I had looked into that option a couple years ago (along the lines of what Terry Oxendale did with his car), and I swear those calipers were NLA anywhere! New, used, reman, etc....I looked for a couple months and found nothing available. You might have had better luck this year, on the west coast, but it appears to be a moot point for you now. I think you'll be much happier overall with the Wilwoods.
I like your custom front air dam! Looks very IMSA-like. Put a thick rubber skirt along the bottom edge to give a good seal with track surface and still be flexible/survivable. Making the unit yourself means you won't have to spend the $ to replace it when you inevitably destroy it in the future. (Speaking from personal experience, of course). 😜