This is fine for a new engine but a non adjustable disributor on an older engine, I think would cause some trouble. The timing chain stretches, the disributor shaft wears, gear wear causes the timing "correlation" to slowly drift. I just checked a v-6 with 200,000 on it and the cam retard was off -16 degrees. Not enough to put it ahead another tooth and I can't figure out why. Any comments on this situation.