Combine orange juice, oil, oregano, garlic powder, onion, parsley. In bottom of slow cooker, spread out butter pieces and torn basil. Set pork on top and pour juice mixture over top. Secure lid and cook on low for 6 hrs.
Place all ingredients for onions into a mason jar and secure lid. Shake vigorously to combine. Let marinate for at least 1 hour (up to 3 days).
Prepare remaining ingredients. Preheat oven to 425deg.
In a bowl combine ricotta cheese, mustard and pickle juice.
Remove pork from slow cooker and chop up, then return to slow cooker.
Prepare the pizza dough up to the first cook level.
Build 1 pizza: spread with half of ricotta mixture, 1 cup swiss cheese, half of pork, half of ham and second cup of swiss cheese. Repeat on second pizza. Place both in oven to cook for 15 minutes.
Sprinkle each pizza with red onions, chopped pickles and cilantro.