kmead
Old enough to know better
Jeff, thanks for pics, See what you mean about side vents not being too well connected to provide ventilation to engine bay without some way of connecting vent outlet to duct to engine bay. When redoing cables/levers and finding suitable site for Bosch ignition module that I explored side duct spaces and their possibilities. Enlightning how much I'm learning about these cars after many years of having owned and driven them without looking into their nooks and crannies.
Today after chatting with Matt at Midwest Bayless am on another issue; fuel lines. May put that on another separate forum.
I think if you have your module up high in the cavity it will be fine. Gravity is your friend, water may get in there but if you are above the vent it will be less water than it sees in the side cavity.
Sad to say mine has sat in plenty of water at different times due to the reality of living under oak trees during the spring and living in a rainy area. The module is well made, probably better made than they intended given that many of them are forty years old and have suffered plenty of weather and not failed.