Just to be clear on what I said, if you were to go to Nationals and be protested for a DMD, if you could show that the DMD was the factory replacement for the SMD, and this means documentation from Ford stating the DMD was the correct replacement part in America, i.e. a TSB or something similar, than you would win the protest. If in fact, since I don't have first hand knowledge, the DMD is the same p/n as the SMD, than it might be wise for someone to get an official answer from SCCA National on its legality. You must remember that in the SCCA, we compete basically on the honor system so be honest about your modifications when you compete. At this point in time, I don't know the legality of the DMD, but since I don't have documentation to say it is legal, then it would lose at protest time. This is all my opinion so please remember that.
Respectfully,
Andy Hohl