I built a 7.4L - 0.030, 10:1, full roller valvetrain with an angry camshaft. I need to set 20 base timing and the marker wont go that far.....I need to hit 20 BTDC....can I measure 10 degrees on the balancer indicator and add to the 0 TDC, mark it and set the timing with the 10 deg (on the...