Just 18-24 hours is all. LOL I cook 'em right around 225 degrees. It' melts in yo mouf, same for my Pulled Pork. Git that pulled Pork done and wrap it in Foil for about 2 hours. Once I do that, I'll open it up and pull that big center bone out with my fingers, then shread the meat with my hands. Add on some of that Sweet baby Ray's BBQ sauce, onion slices and a couple pickles, talk about good