https://opentrackerracing.com/ has all the rollerized front suspension stuff and it is excellent. I have been told that it is not legal in Stock, but is in SS, but who knows for sure? I used it on a 69 Mustang for SS/GT several years ago and the guy who did the front end alignment couldn't believe how well it worked.
If your interested in 429SCJ stuff, I have a bunch of it.