Cowl question

[polevault1977]

I am in the process of reworking a 71 cab. This is my first go at a project like this. Question, what is the provisions gm made for the rainwater that enters the cowl area to exit. I know there is the air flappers on both sides, but is that it. So many footwell areas rust out, isn't there anyway it is supposed to get out once it reaches that point?

One other side question. If you go with a smoothed cowl (filled in). How would you get outside air in esp. if you were using a vintage or old air set-up? Recirculate all the time or what?

Any help appreciated. Still learning about these great trucks.

BTW putting rockers in is a piece of cake, cab corners are a bit#$! This was my first go at any body work.

Thanks, Danny