There was a thread on this same subject back in Feb 2022. I have a sort of related problem. I just reinstalled my 365 trans. Before doing so, I set the engine at TDC on #1 with the cam sprocket timing marks aligned , facing each other, and removed the head for some work. With the engine at TDC on #1, the pointer in the timing window on the bell housing is pointing at the 30deg mark on the flywheel. It can't be a misclocked flywheel because the bolt positions are 60deg apart. Before I did any of this, the engine started & ran well, so timing seemed fine. Flywheel mounting is as the car came to me. Any ideas why the pointer is not aimed at the TDC 0deg mark?