Combine the garlic, brown sugar, pepper, allspice, cloves, and cinnamon in a small bowl and mix to distribute the seasonings.
Coat the pork belly chunks with an even layer of salt and put them in a zip-top plastic bag. Add the garlic-spice mixture and rub it around to coat the pork as evenly as possible. Refrigerate the pork overnight. Midway through, give them a rub and a shake to redi