[barry950]

We have a pair of those DeTomaso heads made for the 289 Engine installed in an original Cobra. After consulting with Peter Brock, we believe there are 3 pair in existance and ours maybe the only ones running. We have not experienced any reliability problems even though the engine produces 403BHP on street gas.
The heads are very similar to the Gurney Weslake heads ( Which we have on a GT40 ) in port configuration, but they have no combustion chambers ( Herron Head). If I can figure out how to post pics I will do so.