I think Gambino was dead set against opening the books and with big paul basically being the acting boss around 74 75 till carlo dies they obeyed his wishes. But the genovese family didnt bow down to his wishes and probaly with tony ducks made a handful of guys. We know tom dibella was a Gambino guy so he probaly didnt want to rock the boat and the bonanno were just getting there footing back in 74 with rastelli becoming boss