By comparing with my 'Cuda I've determined that the holes marked with BLACK arrows are drilled in factory dimpled locations on my Challenger. It sounds like once I get the new valve bracket from Bill Rolik, I can put it over those two holes and that will check the location of the third hole for me. As long as the new bracket lines up with all the holes OK, then I don't think I'll need any measurements Dwight. I'll let you know if it doesn't fit and I still need help. Thank You Very Much for the pics and advice!!

Tav