Well used to be the first big spoalsh would kill The Rabbit.
Now it takes about 5 minutes of continued dunking to even get a misfire. Dizzy has the breather run through the firewall and the base smeared with silicone grase so it seals. Inside the ht boots is the same, grease to ensure a seal and a bit on the wire as it passes through the boot.
Coil wise, I have a rubber boot I got from billing for about £1 and its works a charm.
Only let-down I have at the moment is the plug ends fouling. Need to work a solution for that, someone has suggested hi-temp silicon spray.