Prepare noodles according to package directions. Arrange noodles in 6 serving bowls. Top with slaw mix and onion; set aside.
While noodles are cooking, combine chicken broth, fish sauce and soy sauce in a medium saucepan and bring to a boil over medium-high heat. Reduce heat to low and keep broth just below a simmer. In a very large skillet over medium-high heat, warm oil. Add pork and cook until browned and internal temperature of the pork reaches 145°F., 1 to 2 min., per side. You may have to do this in batches. Remove pork and rest for 3 min., and arrange pork on top of noodle bowls. Ladle in broth, garnish with basil and lime wedges, and serve.