I don't remember you having trouble at the AVI. I'm kinda old, but probably wasn't part of that!

I do remember the Laker Boat coming it at Big River limping like a blown engine and Nick (CJ222) and Ralph practically rebuilding his carb right there on the beach and he was golden in about an hour! So I'm with you on the SCJB gang! Can't find better peeps anywhere!

The Pertronix will probably help many things, but an intermittent ignition failure would indicate POSSIBLE other issues that I don't think it's going to fix bro! Given what I know of the situation.
Yes wiring, for 1. But is water getting to the dizzy through a small, spray like leak from the pump or even outboard spraying in (Ask Crewcheif about that one, he warned me ahead of time for this on Chebbies with Jacuzzi's, why does he have a splash guard?).
I had an issue with a boat I still own, but is, well, in Davy Jones' Locker at the moment and probably permanently, that did something like this as well and it took the Vegas crew (OC2, Nordie and HDRider) to figure out it was the ignition switch, and possibly a couple bad wires at the engine. A $16 fix that I know Terry was stumped on big time for a bit!
Same thing happened with Moo. After I built the engine (Built for another boat, really), and installed it, the wiring, plumbing, et al, went to fire it up for the first time, put the key in and nothing, several times! Pulled the key out, the whole guts came out with it. Did fire it with a screwdriver but wouldn't stay running, had to hit a marine store the next day for a new switch. Now I carry one under the seat of each boat.
Be careful just changing things out without figuring out the why's, IMHO. (I'm knee deep into a similar debacle figuring out where a gallon and a half of water found its way into Moo's engine. Not an easy thing sometimes, but best to get it right the first time by asking why?) You're making the right decision to go electronic, I'm just not convinced it's the source of evil.

Ray