It is possible. I did not confirm that the #1 piston was exactly at TD zero after I installed the damper.

But, I do know that the dizzy only has 15* of mechanical in it for sure because 1) it is just a difference between initial and total, and 2) I verified it with the little checking tool that comes with the dizzy kit.

The engine runs well with anywhere from 16*-23* initial. It seems to run best from 19*-22*. Those numbers are in the correct ball park for the cam.

Good suggestion though since it is an original damper.