My second 1965 Dodge Dart.
I have been slow. The Owatrol oil did not fix the leak, and after a long time, wondering what to do, and what not to. Even considering selling the car, I sprayed some undercoating into the cowl. Still leaking. More frustration, and even closer to giving up. But, like a week ago or maybe a bit more, I managed to stick a brand new spray can with Rustoleum Undercoating up from the inside of the car, and spray it over the edge of the pipe in the cowl. Now I have sprayed quite a bit of water in, and just let it run, and it did not come any water into the car anymore. I must have hit the hole and plugged it.
So, it means I can start thinking about going forward with other things, a little by little.
Hopefully it may come more updates more often.