Yes! You can prep and make these carnitas ahead of time, such as the day or night before, and finish them up by broiling when you're ready. To make them ahead of time, follow the instructions up to the point of broiling. Shred the pork, mix it with the sauce and then store in an airtight container or bag for up to 3 days. Once you're ready to eat them, spread the shredded pork out on a sheet pan and reheat in the oven for 20 minutes on 350 degrees. Then, turn the oven to broil and broil as instructed until they're golden and crispy.