Back in the 70's I just lined up the marks and went on my way. Now I know what the smart kids were doing.
I've seen many gear sets have the dot on the cam gear not directly over the point of the gear tooth, more towards the middle
If I align the dot to the right side facing the gear it would be one tooth off which is right at 12 degrees on the 3 bolt BB gear sets with the 3 keyways on the crank gear
I've seen many BB Mopar builds that wouldn't fall out of a tree with the cam retarded 12 degrees
I learned that lesson, about NOT assuming lining up the dots was the best way to install cams the hard way, it was on the first solid roller cam I built for a customer
Turned out the cam keyway was cut into it 10 degrees off
I degree every cam now
, why shouldn't you
DO IT