putting a ford 5.0 in a 72 Dart

Threads like this always make me think of Cuba.
We are NOT Cuba.
Those poor dudes are severely limited in terms of what they car do with their cars given the scarcity of parts. They are MacGuyvers in every sense of the word.
Here, we have a vast array of choices. We can even go bonkers and put a Cummins in a Duster like another FABO member is attempting to do.
Some people get their minds stuck on the Dare to be different mindset even if doing so costs 3 times what a traditional Mopar build would be while being much harder to do and maybe even ending up being harder to service while not being any faster than a stroked 340.
Feel free to go buck wild but know that it will probably be worth a LOT less if you ever want to sell it because different doesn't appeal to that many people.