With a knife, scrape any stray hairs on pork leg and trim off nails.
In a large pot over medium heat, combine pork leg, vinegar, 7-up, enough water to cover, garlic, peppercorns, bay leaves, and ⅓ cup salt. Bring to a boil, skimming scum that may accumulate on top.
Lower heat, cover, and then simmer for about 1-½ to 2 hours or until meat is tender but not falling apart. If the meat is drying before it is fully cooked, add more water in 1 cup increments.
Drain pork leg, discarding liquid and aromatics. Place on a rack and allow to cool to touch.
Sprinkle with about 2 tablespoons salt and massage all over. Place in a container with a lid and freeze overnight.
In a large, tall pot over medium heat, heat about 4 to 5 cups of oil (enough to cover the pork leg during deep-frying) to 350 F.
Gently add pork leg and deep-fry, turning as needed, until golden.
Remove pork from the pat and drain on a wire rack set over a baking sheet. Let rest for about 3 to 5 minutes before chopping. Serve hot with dipping sauce.