After contacting several vendors looking for two part / catalytic cured silicone, I found this single component coating on Amazon. It's roughly the consistency of paint which is what I wanted, but required several "coats" to create a nice seal around the wiring penetrations.



Should also work well to coat the board if so desired. For now I'm just putting a dessicant pack in the case to absorb any condensation that might occur.

Just dropped my block off with a machinist this morning. Sounds like I may be waiting 3-5 weeks to get the bores trued up and the shipping container of forged cranks to arrive. Patience is difficult for me to conjure when I walk out in the garage and see a pile of parts instead of a car.