72 360 first start question

copy that, we are on the same page. That's is how i found TDC. My 2 marks were about 10 degrees apart my true TDC mark is about 10 degrees before the factory mark. I was incorrect before about the slit being so far off. I just realized that my dampner has 4 slits with their zero degree mark being the first. I was thinking that the next mark after zero was their slit but was just confused. anyway, true TDC is about 10 degrees before the factory slit that they marked zero. When the #1 piston is at the highest point on it's compression stroke my new mark lines up with the zero mark on the timing cover perfectly. you can see mark just above theirs between the two blue dots.