76 Plymouth Valiant won't start

The leaks could be the cowl vent system. There are holes on the ends to drain, they get trashed up and mudded up and plugged. Also in some cars, the cowl can rust through. There are rings to make a "tub" up in the cowl above the vent holes. There was a thread the other day..........

Here read this.......

http://www.forabodiesonly.com/mopar/showthread.php?t=318012

Here's one someone was working over. You are looking at the bottom of the cowl, that piece is up inside the dash, the vent boxes are under those holes