Which way do i go? I want to retard it 4 degrees.

I just installed a cam that was reground. When i pulled it out it was dot to dot and measured 1* advanced.
I got it back thinking it would have no advance ground in. So i used the 6* advanced keyways and it was way off.

Ended up using the zero keyways and installed at 105*, 6* advanced.

Gotta measure to be sure.