Here's a helpful temp chart to use as a guideline.
I generally run my pork loins (from Sam's, cut in half) up to 165F @ ~225F smoker temp for 10-12 hours.
Meat Temp Chart
Looow & Sloooow. That's how BBQ cookers get that pulled pork so tender it falls apart with a nudge. BBQers (as opposed to grillers) generally cook larger cuts like a pork butt at around 200 -225 for hours and hours, like 10-15 or more. A whole broiler would likely be done in 4-5 hrs. The low...
If ours (when we get em) do that, my wife will be in heaven. She constantly wants me to show the vid (from one of the BYC gang) with the Buff Os running to "Henny Pennies, c'mere girls". "Zees I want! Zees I want!!!!"