I know that isn't a Fox Platform but the fox chassis has received almost any engine swap imaginable at this point, you would think the ford people would be used to it.
Swaps I have seen first hand into the fox platform. LS G3 Hemi Small Block Mopar Small Block Chevy Big Block Chevy 2JZ
I'll add big block RB Mopar to your list. I have a buddy with a Fox that has a 440 in it. Yes, I've seen it. No, I don't know why he did it.