Place pork in an aluminum tray with high sides to contain the juices and place the pork in fat side up
Mix together the rub ingredients, pour over the pork and work into all sides
Add the onion, jalapeno, and garlic on top of the meat (do not worry about spreading it out)
Squeeze both oranges over the meat and discard the rinds
Set the smoker to 225 degrees, insert meat probe and cook until internal temperature is 160 degrees
Once at temp (4-5 hours), cover/tent with aluminum foil and continue smoking until the internal temperature reaches 204 degrees
Remove from the grill and place in an unheated oven (with foil on) for 1-2 hours to rest
Remove the bone and pull the meat