I recall there being something about a guy cutting up some 5.7 Hemi heads and modifying it to fit the /6.

https://www.jalopyjournal.com/forum/threads/home-brew-hemi-head-slant-six.372471/

Don't know if it was BS or not though. The pictures were hosted on photobucket, so those are gone.

1987 Fifth Avenue - 512/518/D60