[Michael C Henry]

Did you ever check to see if you harmonic ballancer s timing mark are true and accurate? The outer ring has been known to slip. I would propose the piston stop bolt test, are you familar? The piston stop bolt is a tool. I bought mine on ebay. The out side is made to match your spark plug threads in you heads (you'll have to figure out which spark plug threads your heads have ) and has an inner bolt (usually brass) that screws in and out to whatever depth you need to meet and stop the #1 piston. I bought two. The first one I put away some where safe. I haven't found it yet. I gave up and bought another piston stop bolt. I know where that one is.