Well Richard, you are right about a "few" chevy's coming across my way. Before we get too serious about confusing the issue, Please go back to your RCDENGINEERING.COM article and read paragraph #6. Is states you not only bring the #1 up to TDC, but make sure it's on overlap. The exhaust and Intake being equal on their downward or upward travel. This means it's on overlap and #6 is under compression. Cam dowel at 3 o'clock position with marks being aligned together.