Have you ever heard of a Traeger?
It looks like a BBQ but it's actually a smoker.
We have had ours for about 5 years and love cooking on it.
If you have one, you can make this recipe and then put the pork on the Traeger on the smoke setting until it reaches the correct temp. Mine took about 7 hours.
The recipe below shows how to cook it on a regular grill.