[69 longhorn]

Yes, every mark shouldbe 2 degrees. I think that you should be able to run that initial timing from 8-12 degrees(just go 2 degrees at a time, & check for spark rattle). To get the most out of it, you may have to recurve. I use a Crane adjustable advance can,set for 10 degrees of vac timing,& plugged to full man vac source @ the carb(limit the pull to .110 on the plunger),& use the springs to give full mech advance @ 2800-3000 on a street truck. You can set the curve faster for racing,but the idle will be erratic if the advance is opening @ idle speed(too weak of springs). Good luck.......69 longhorn.