Yeah Chang, it's in Selwyn Raab's book "The Five Families". Coincidentally, I was just reading that part the other night and then came across your post today. In the book, it says that FBI surveillance picked up Bruno Indelicato arriving at the Ravenite less than an hour after Galante was rubbed out. Supposedly, the agents saw Dellacroce and Bonanno family higher ups hugging, kissing, and congratulating Bruno on the sidewalk outside of the club. Bruno was also confirmed to be one of the shooters several years later when somebody working in the FBI crime lab was able to match one of Bruno's fingerprints to one found inside one of the rear doors in the getaway car that they found after Galante's murder.

I would love to see those FBI surveillance pictures if they are somewhere to be found on the internet.