As far as I can remember, that was already solved on the Pertronix II.
Pertronix claimed it wasn't an issue on the original, then they claimed they fixed it on the V2, then they claimed they fixed it on the V3.
There were a lot of reported failures on the V2 (thus why they claimed to fix it for the V3). Maybe it is actually fixed now, but I would not hold my breath.
There are a lot of advantages to using a (comparatively) low voltage/current trigger, but doing a full HEI conversion is a more reliable solution.
If you want to keep the stock look, that does limit your options. Good luck whatever solution you choose.
