Aluminum heads? This may sound crazy to you but I had a similiar problem with the fowling..I called msd and talked with their tech, this is what he said...he said ground the two heads together with 14 guage wire, then he said ground the minus side of the coil to one of the aluminum heads. He said this is a common problem...guess what? It helped mine immediately...drove it about 50 miles on a short trip and plulgs cleaned up....I could not believe it but it worked on mine...I also have a 750 holley.
