do hemi heads fit other blocks?

There was a company back in the 80's that made a head, I believe that they called it a "Stage 5" hemi head that would bolt to the 440 block. Their design was superior to the other's as it had one bolt in the exhaust port and had better ports than the other competitors.

Hell they made Hemi heads for a la block as well. Don think they're made anymore but I think the price was about 7k for the heads.