WOT - is that Wide Open Throttle (for us dolts who do not know)
I know nothing about automobile electronics and nothing about HEI, but Pertronix specs show a wide voltage range for their units (8v-16v for their 12v units).
A few things that I have noticed about my Pertronix units (beside not having to change/adjust them) is quick staring and smoother low idles.
A well-grounded engine is also a good thing.
