There is a dimple on one side of the dizzy gear above the pin. It is supposed to be positioned with the rotor contact. That said, offshore mass production tolerances are not so predictable, as many have found rotating 180 solves it.
The roll pin can be reused if it feels tight and peening the ends should keep it there.
There is a lot of casting flashing on the back of the upper plenum that restricts dizzy rotation and can buy you that half tooth off cmp error, if you carefully remove it with a grinder at the points were the 1 & 8 dizzy/plug wire terminals are limiting the rotation. Don’t go too nuts on the #1 side as there is a plenum bolt under it. On the #8 side there is less concern smoothing that flashing down.
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