Looking at the Pacific Customs site I found just what I was talking about...
http://www.pacificcustoms.com/mm5/me..._Code=featured
And this is the Summit Racing thing...
http://www.summitracing.com/parts/VDO-340011/?rtype=10
It would work for guys like me with Supers cause my speedo cable is two pieces with a box in the middle that does who knows what. I think it was for a mileage reminder light that never worked. So I could easily replace it with this. People without this weird box would have to find a couple to connect the two.