Need advice 360 timing chain cam/crank slightly off

I'm all good with dot to dot UNTIL, you get a series of stacking tolerance issues and a cam ends up installed 10-12* retarded. Crank gear keyway cut a little off, dowel hole/woodruff key in cam a little off, cam gear locating a little off, marking the cam gear on wrong tooth. Makes for loads of fun.

It's a simple procedure to insure that the cam is installed where it is supposed to be. The cam in the OP's deal is way off just from a visual, I wouldn't trust anything with regards to marks alone.

The cam gear at 6 or 12 oclock make no difference. It just changes the piston tdc/firing, distributor line up on fire up. On mopars SB cam gear 6 oclock = #6 firing, at 12 it's #1 firing
Make zero difference for install or function of the engine. Crank gear turns 2 times for every one time the cam turns.