I will give you and anyone else with a Bullnose a suggestion. The issue with the drains clogging is caused by leaves falling (or being blown) through the cowl grille slots, Ford changed this in 1987 by going to one that has lots of little holes. On a Bullnose, a piece of screen, preferably plastic, cut to fit, will keep the leaves out, but still let plenty of air in.
I can't claim credit for this idea, I saw it on a Chevy 1 ton van while I had the front and part of the engie disassembled.