I think it is a lot more complicated than just replacing the control arms.
There is a photo album on the Kirkham Motorsports facebook page called "427 Stainless Chassis". It shows a frame with the traditional suspension on one side and the billet suspension on the other side.
Here is a link to the Kirkham Motorsports "wall":
Kirkham Motorsports - Local Business - Provo - Wall | Facebook
Scroll down that page and you will find the album on February 8th.