OK so I am attempting to make pulled pork for the first time....It is a little over 6 lbs of meat and in the directions I had originally seen I thought I had seen to leave it uncovered. I made me own rub and put it into the oven at 275. It has been in there for 3 hours now and I am going over bbq recipes and noticed that in most of the ones I have seen it says to cover with foil. Should I take it out at this point and cover my roasting pan or leave it alone? Also, how long do you think I should have it in there for at 275? 6-7 hours?