Water Leaking in

Today I went through a car wash to find where the leaks were and low and behold they were not where I expected. There was the ones from the door windows which I did expect but there was water flooding in from the air box under the dash. Any idea why or what I need to do to fix that?

Had the same problem on my 74 Dart. Was happening on the passenger side.
Turned out it was leaking through the lower windshield/weather strip, on that side.