If I remember correctly, in Murder Machine Dom said that after Carlo Gambino passed away, the sit down was at Nino Gaggi's place. Dom was givin an AR, and instructed to sit by the window, and Nino gave instructions to kill everyone coming out the door, if such and such were to happen. Can't remember the exact details. But I was under the impression that if Dellacroce and his goon's had an objections about Gambino's wishes they would of been put down there.