Matt,

The real rain issue is not engine related.  It is wing leading edge abrasion that causes me to slow down and avoid downpours.

The engine can handle quite a lot of water.  The water merely displaces some of your fuel/air mixture causing an irrelevant reduction in power.

Regarding intakes, I'm on the road so can't photo.  I do however strongly encourage a sound connection from cowl entry into the carb or servo.  I may be the exception however as I've seen many installations that allow leakage.  The question here is lost ram rise versus ease of cowl removal.  I built a little access panel so I could clamp both ends of my ram air hose.  It's of low stakes to many.

Larry Henney
N360LH