Well The 6.0 is'nt doing that good from what i hear alot of the 7.3 faithfulls are not really happy with the 6.0...But here is one thing you might think of I live in The Detroit area, The motor city, most of the companies here are hooked up with the Big 3, and if you want to find a prototype company working for the Big 3, then all you have to do is get into the yellow pages, and there are alot of them.
So when you really think about it, is it possible that since i live in the Detroit area I might really know someone who might really know something,,,,Like I said I dont want to start a keyboard war about this,,just keep the words..7.2-H4 in mind and see what happens...also I dont know what the H4 stands for, could it be 4 valves per cylinder.. I dont know but in the next 6 months I probly will...