I've had several timing sets like this one, Cloyes , that the upper cam gear was off a half a tooth, it would ailn straight up and down with any of the crank gear alignments marks. They were all off a half tooth
If yours are that way move the cam gear clockwise so the cam dot is to the left of the crank gear looking at it from the front
One tooth is right at 12 degrees so if you want use the 0 dot for no additional cam advance The reason being some of those timing stes have two camshaft degrees advance built in a nd some don't
Same thing on the cams on built in advance
Good luck, you should be able to feel the difference on getting the cam dial in and advanced
Let us know how it goes