I need some advice. I've got 2 pork shoulders (boston butts) each about 7.5 lbs a piece. I'll be smoking them on my old smokey electric smoker. I normally smoke 1 pork shoulder for about 1-1.5 hrs a lb to get to 190 degrees so that it pulls easily. My question is, if I use the same method for smoking 2 at once will I need to add some cook time and if so how much? I'll need to have them rested, and pulled by 4:30pm on Saturday for a party. Any advice on when I should put them both on? Thanks for any advice!