My recipe would be as follows:
Soak roast in a brine solution overnight then rinse well and place in a large crock pot with 1/2 bottle Dales Marinade, 1 bottle Liquid Smoke, 3/4 can Coke, 2tsp fresh ground sea salt, 1 tsp fresh ground black pepper, 2 large jalapeno peppers sliced in half and de seeded one medium white onion, quartered and enough water to just cover roast hen put that Crock Pot on low and let er go for about 10 hrs or until meat is very tender and breaks apart easily with a fork. Drain off juices, remove onions and jalapenos , shred meat with a fork, add two bottles of your favorite BBQ sauce, mix welland put it back on low for about another hour then enjoy.