318 Poly heads and stuff

Nope. Those are oil drain backs to the pan from the heads.
Well.....I said that but you may be correct, but I don't think so. Looking at this, the blue hoses go into the pan, but on the assembled engine, they go into the timing cover. There's no water where they go into the cover though, so they had to change to the timing cover for some reason.
https://www.motortrend.com/uploads/sites/21/2016/11/mopar-318-poly-oil-pan.jpg