That will be an absolute handful. it's amazing what they can stuff in that engine bay though, i've seen pictures of ford coyote 5.0's in gt86's along with the more standard 2jz and ls swaps. the 1fz is probably the longest engine attempted.
i've been looking into something similar. i'm thinking a good gutter mount would do the trick with a little modification. i've thought about buying gamiviti mounts or @reevesci (Trail Taylor) on this forum just came out with gutter mounts that look very strong.