Mix steak seasoning sauce,6 tbsp brown sugar, bourbon, and scallions together in a large bowl to make marinade
Toss salmon cubes in marinade. Cover with plastic wrap and let sit in the refrigerator, 4 to 6 hours.
Wrap each salmon cube with bacon; use a toothpick to hold bacon in place. Sprinkle remaining 2 tbsp brown sugar on top
Preheat an outdoor grill for medium heat and lightly oil the grate
Grill bacon-wrapped salmon, turning frequently, until bacon begins to crisp about 5 minutes.