Hi KRE!
I quit smoking loins many years ago. I get a much better product when grilled.
Glad to hear you are brining as that will help. This is one of the few pieces of meat I bother to brine. In all my experimenting, brining has the biggest impact on this cut.
Final temp should be no more than 150�...take it out at 145�, foil and let it sit for 15 minutes. Don't go above 150� or it will be really dried out.
Sorry, but NO idea on the time to cook...it has simply been too long.
One word of warning....the middle will still be pink and with a crowd that big, SOMEONE will think the pork to be undercooked. When faced with this, I explain that Trichinae is killed at 137� and then show several folks my meat thermometer readings when I pull it.
Good luck!