I know the slots you're talking about, but my car has none. The cowl area is one solid piece, no holes, no slots. And the windsheild strip looks pretty good, but I suppose it could be going under the chrome trim or something. I just pulled the front half of the carpet out and set it out in the sun, shouldnt take too long to dry it out and then I'll pull it back into the barn/shop. I think I'm not going to worry to much about that leak and just try and fix that other thing and buy a little garage or something. Don't plan on driving it in the rain anyways.
And uncltrvlnmatt, you might be right on the no overfill thing. Was looking at parts on eBay last night and saw one and when I clicked on it, it turned out to be a windshield washer resevior... which might just mean that the PO hooked it up as a overfill tank. it's busted up pretty bad so I'm just going to buy a new radiator and run the pipe down the side like normal.
In other news, I've been doing some thinking and I might try and find some Mach 1 front seats for this thing. Those stock two pieces of leather wrapped cardboard just arent going to keep me from sliding around, especially with just a tiny lap belt haha.