An ignition system (and electrical system) "moisture" solution ron....
Back in the old days (that means when offroad race mosikles had energy-transfer magneto ignitions with breaker points), even high humidity/condensation could kill 'em periodically! Same for breaker point distributors in v-dub buggies, etc. And most especially, point-type ignitions (either mags or battery-powered) in outboard motors.
One of the first products that this company ever developed was "lps 3":
lps 3
And it is truly wondrous stuff! We actually sprayed it into the guts of the mags while the engines were running. In your case, we'd just spray all over the distributor and plug wires/connectors. Made a mess of nicely detailed engine bay...but it did come as close to "waterproofing" an ignition system as ya could ever get.
Those vinyl "boots" that slip over the distributor caps worked really well also...but still moisture would penetrate/condense underneath and then the corrosion process really accelerated if ya didn't take all the stuff apart and dry/clean/re-treat. And those distributor boots must be vented in some manner or condensation becomes a far worse problem than just surface moisture.
When electronic-trigger mags came into being, folks thought the moisture issue was solved...not so. Any non-sealed connection point then became problematic, and rust/corrosion would build up on non-treated magnet segments in flywheels and on mag pickups which would reduce the effective "air gap" to interference and kill the system. Usually that resulted in the entire electronic guts of the "controller/brain" (usually found inside the ignition coil) taking a permanent hike to the tune of many dineros! Can we spell motoplat, femsatronic, marelli, hitachi, denso, ???
Lps 3 rules even 40 years later!