Cam degreeing help me understand!

Thanks YR. I really appreciate your input. It's going into a heavy B-Body street only so I am more concerned with street friendly bottom end power. I reinstalled the 3 way adjustable crank sprocket at 4 degrees advanced but haven't taken new measurements yet (working 12's this weekend). If I am understanding this correctly I should be at 106 ICL. I will need another way to get me to 104 ICL. Perhaps an offset keyway. I'll confirm with measurements on Monday before I cross that bridge. Cheers.