My guess is 100 CC and 150 LMB assuming there are no other adult predators. Be sure to habituate them. You can always add more but taking them out is a lot of work. Larger LMB (5-6 inch) would be better IMO and if so then 100 is enough.
Nothing in the tank but BG and FHM. Many of the BG are already 7”+ long. Will they kill my fingerling bass in significant numbers?