I have a set of those wheels I adapted brakes to about ten years ago. Used Wilwood calipers and rotors for 12 spokes but had to do some machining on the rotors and redrill them. Contact me and I can give you more info.
I know this is an old thread but since k-member resurrected it, I thought I would add some input. I think Wilwood had the best way to adapt brakes to the original wheels, but I can personally vouch for the Real Rodders Wheels new version if you decide to go that way. I bought the first pair "site-unseen" several years ago and they work great. That's actually our 34 Tudor Sedan pictured above (not a Vicky, by the way but thanks for the compliment). After several years and lots of miles at high speed (usually highway cruise at >85 mph) as well as participating at the GoodGuys Road Course last October in Texas...they not only stop the car, but they withstand the the weight of a heavier than intended recipient that the spindlemount wheels were designed for. I just flat out like the way they look and would highly recommend Real Rodders Wheels for their quality and outstanding customer service to anyone. Let me know if I can answer any questions for you.