Yes, I think you can just broil for a few min. at the end, but I meant the cracklings to be finished while the meat was resting. You want to cut the cracklings off the roast, drap the roast in foil, and then deal with the cracklings on their own. They help keep the meat moist as it roasts, but the time and temp are too low to get the skin crisp. So fry, or broil, or high heat roast the skin on its own for more time to crisp up.