I have mocked up a 7.3L Godzilla in a rolling chassis with a 6R80 behind it with an AA Crossmember.
I just had flat plate bolted to the motor mounts on the motor and used the motor mounts that BC uses for the Coyote mounts. With the BC type mounts in the frame perches and resting on the engine plate mount it could be welded up as is, or moved back if needed.
The 7.3L is Long. Very Long. Since I did not have a body on the chassis I was not able to see how far back I could move the whole engine / transmission assembly. The front of the oil pan touches the Front Crossmember on the Frame. The Exhaust manifolds that come on the Crate Motor dump out right on top of the frame rails and keep the motor from being lowered down completely.
The bottom of the Oil Pan clears the Dana 44 but not by much. If the whole assembly was able to be moved back a couple inches, oil pan clearance may be fine?
The 7.3L is also Very tall. An after market hood and Body Lift would be enough to clear though.
For an Early Bronco install, shorty headers will have to be made, and moving the engine/transmission assembly back when used with an AA crossmember if possible.
OBR is the only Power Pack available for a complete install. It's Very expensive compared to a Ford Coyote Power Pack. I am waiting for the Godzilla Ford Power Pack. Why Ford sells a complete Godzilla Crate Motor with No electronics available is beyond me???
For a custom install, I think it's very doable but with a lot of mocking up to do.
My 7.3L Godzilla is now slated for my 71 F-100 4x4 with the 6R80 behind it. A lot more room in this vehicle for an install. I'm praying for a Ford Godzilla Power Pack for it.