It is such a giant opening. No wonder water is getting in to passenger floor. I read somewhere that someone fashioned a plexiglass cover with some air holes and somehow fastened it over the hole.

Also, there is like a little rubber dam with a moving flap that allows water to flow into the passenger side cowl drain. I am wondering if that part should be removed to aid water getting into the drain.

BTW, I successfully unplugged the cowl drain that has been plugged up. Had to remove rocker panel and attacked from opposite end.

Thanks Again, Jim!