That's another problem. I have marked TDC half a dozen times and verified that the rotor is pointing at the #1 cylinder, but every time I put my timing light on it it shines NO WHERE near where I marked it. It's been frustrating. Keep in mind, this engine has an MSD distributor and ignition. Maybe it's my timing light? It's NOT a dial back timing light. I was thinking of trying another to see if it behaves differently.