I have no idea what you are talking about but I drive mine on the street every day, with an aluminum FW and an iron disc. My wife can drive the car. It's not eating FW's or pressure plates and I don't have to slip it to get the car to move. Just blows my mind how things get this sideways. Most guys should run a diaphram and a rag disc and forget it.
EDIT: I do not know one single drag racer who wants a bunch of mass hanging off the crank. On my street car, I want the least amount of rotating mass I can get away with, let alone in a DR application.