This is sort of a separate question, but still related.....

Is the crank keyway slot always machined in the identical
indexed position on all cranks ? Meaning that, can you not tell
if the dampener ring has slipped just by looking at where
the "0" mark is on the dampener in relation to the keyway
slot ?

Also, if the front cover and timing pointer are all assembled,
so you can't see the crank keyway slot,
then with the piston at TDC exactly, should not the timing mark
on the dampener also be right on the "0" timing pointer ?
On a fresh factory motor that is.

What I'm getting at is visual tools to see if the dampener
has spun, without measuring.