And interesting to note is that Domenico Arcuri, Sr. was apparantly connected and/or respected enough to have been present at the Bono wedding in New York in 1980, where many big names were present. Mafia Inc. also states that Arcuri was liked by Bonanno capos back in the 1970s.

And another interesting thing is that Arcuri worked for Violi's right-hand man, Pietro Sciarra (apparantly also from Agrigento), who was the first victim of the Rizzuto take-over. After this, Arcuri probably switched to the Rizzuto's.

Therefore I think he could be the logical successor as head of the Montreal mafia. I wouldn't be suprised if it were actually the Arcuris who set Montagna up.