I have searched and don't really find the answer for this although I am sure it is here somewhere. I need to mount my distributor from scratch as someone (me) did not adequately prepare when it was removed. The instructions are saying I need to be at TDC on the compression stroke. I know TDC from the flywheel mark but I understand it is not the same. I placed a piece of paper over the spark plug hole and can see when it blows out but there must be a more accurate way of determining this. My valve cover is off, and as I said I have access to the flywheel mark. My timing cover is off as well but I have new unmarked gears. Thanks Bruce