I have mentioned before an assassination attempt on Dellacroce. Found a couple of articles dealing with this. The first one, published in Niagara Falls Gazette in Feb 1970, deals with Dellacroce´s attempt to dethrone Gambino from his position.
The second one, published in Oswego Palladium in Sep 1972, deals with the murder attempt on Dellacroce. If somebody has more details on the murder attempt, and the circumstances surrounding it, please share!