During the Rainy Season - I found out my '71 Duster had sprung a leak!

Well guys-all of you were right. I had my wife in the Duster with 3 large disposable turkey pans. I covered the vents and ran water over the windshield. Water started to fill the pans inside my Duster. My wife yelled, " Shut the water off". I probed a little with a screwdriver and the windshield has torn through what I believe to be the original rubber weather-stripping. The metal trim is loose and would fall off easily. I ordered a new front rubber for the windshield. The second experiment produced the same results. This time, I covered the windshield with plastic to seal it up pretty good, and left the hood vents open and exposed. Again, my wife was in the car with the three empty turkey pans. I shot water on the hood, and my wife yelled immediately, "Shut off the water"! More water came in through the vents than through the windshield.
OldManMopar, I think you were right-on about there being rust, cracks, and leaks around those vents. Thanks for the pictures, an illustration is worth a thousand words. Are you sure that removal of the cowl is not necessary? I just get to the areas that are chipped, cracked and rusted out by going up with my arm through the vent door under dash and seal the mentioned areas in the pictures by using the Por 15 putty? Donniedon