do you have any information on the swap? My family has a willys as well and keeping the original engine going is more work than it's worth. This would be a great alternative.
I did an emergency rear heater bypass to get the truck home. The hard lines running above the exhaust let go. It was stranded at a friends house 80 miles away.
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.