I did this cook a few weeks ago.
I St. Louis cut one rack of spare ribs. I rubbed it with my standard pork rub (sucralose, chili powder, paprika, garlic powder, onion powder, salt and pepper). I cooked it on my 22 1/2" WSM at 250F for about 2 1/2 hours unfoiled, then foiled for about another 2...