And then you got the really big boys the 477 and the 534 medium and heavy-duty truck engines. Not an FE engine but the architecture has a lot of the same design features only larger.
Those are the Super Duty engines. They have more in common with the 385 series, but truthfully, they have nothing in common with anything else Ford ever made. I've been looking for a 534 for quite some time. I want to put one in a rat rod. lol