Mighty 6 has one on his engie set up.
http://www.mighty6.com/gallery3/d/70-2/DSC00153.JPGhttp://www.mighty6.com/gallery3/d/80-2/DSC00173.JPGI have considered running one myself. i will most likely pruchase one sometime early next year after i get off the dyno
Also, i think you need to run a distributor with a locked advance.