If we do it right and mount the vent directly above the gap between the radiator and the front exhaust manifold, the water can just drip straight through onto the ground.
I have a vented hood right now, that I did myself and I have NEVER had any issues with rain, car washes or snow, etc. So I don't think you have anything to worry about.
And yes, the Cosworth vents on it are FULLY functional.
2000 SVT Turbo 295hp/269ftlb@12psi
#1 for Bendix Brakes Kits!
Knuckles rebuilt w/new bearings $55
AUSSIE ENDLINKS $70
Gutted pre-cats $80/set
A lack of planning on your part does not constitute an emergency on mine!