This is what I do, and they are fall off the bone good!
Oven at 275
Buy a large disposable foil pan (they can be found at any grocery store)
I make a rub out of paprika, brown sugar, sugar, pepper, garlic powder, red pepper flakes, onion powder, kosher salt. I don't measure I just dump some of the spices in a bowl until I think I have enough to rub down the whole rack of ribs. If I run out I make more!
Place the ribs in the pan (no need to grease the pan) and rub down both sides with your spice mix.
Pour 3/4 can beer or coke around the edges of the pan. Cover with foil. Drink the rest of the Beer or Coke.
Place in oven and forget about them for the next 3 and 1/2 to 4 hours.
When the meat pulls away from bone with a fork and a light touch remove the foil. Baste with BBQ and place back in the oven for 20-30 min. Or until the BBQ becomes tacky to the touch. Like they would be had they been cooked on a grill with BBQ sauce.
Remove from the oven and enjoy!
I like to place mine on a big wooden meat platter and cut up before letting people dig in because the basically fall apart. They kill every time! Hope this helps.