I do my SLC ribs in just under 4 hours. Trim the ribs and rub them down. We like our food a little spicy, so I found the following rub mixture:
• 2 tablespoons paprika
• 1 teaspoon freshly cracked black pepper
• 1 tablespoon brown sugar
• 1 teaspoon kosher salt
• 1/2 teaspoon celery seed
• 2 teaspoons of Cajun seasoning (like Slap Ya Mama), or to taste
• 1/4 teaspoon garlic powder
• 1/2 teaspoon dry mustard
• 1/2 teaspoon cumin
While those set up, I get the WSM going. I use KBB and a little Apple or Cherry wood. She likes to run around 270* - 280*, so that works for me. Once she starts burning TBS, I throw the ribs on.
If I throw them on at 12, I don't touch the smoker again until 2. At that time, if I am going to wrap, I will grab them off, take them inside, wrap, and return them to the grill. At 3, I will grab them off, take them inside, unwrap, and throw them back on. I start checking for bendy around 3:30 - 3:45. They are usually done before 4.
If I am not going to wrap, it is pretty much the same, but I start checking them a little sooner. Either way makes great ribs, juicy, with a slight pull, but pulls clean off the bone.