What are the best Mopar heads?

I guess I opened up a can of worms here. I want to keep the engine all Mopar. I just wanted to find the highest horsepower heads without doing any work to them, other than a port and polish.

One other thing: Back in the late 70's, I knew a guy that had a really fast Swinger. It had a 340 with Hemi heads. I kid you not, I saw them myself, and he offered to sell them to me when he sold the car, because he kept the engine. Life a fool (with no money) I declined. He told me that they were real Chrysler heads. Did they ever make such a thing, or would they have been aftermarket?