Re: 84 302 into 85 falc ute
Engineers certifiacte should stop all the fuss for a start, you will have to comply with all ADR's for the engine you put in, such as emmisions etc, but being a USA motor dont know how that works.
Contact a local engineer who should have all the answers for you, and try local transport authority on paperwork required.
I did put something here, but it vanshied, I think
"So long and thanks for all the fish!"