[PaperBagger'14]

Pork internal temp is ideally at 145f, so if it's a fair sized roast I would probably bbq until about 140f and let the internal temp of the meat continue to cook it until 145-150. Cooking until 160 would put it in the 165-170f range and at that point you'd be better off getting it to 200f for pulled pork. That's just my opinion.

Also consider a 24h dry brine of the pork prior to bbqing.