Falling off but not vanishing. Richie the Boot lived until the early 80s (82?) and was deep into City Hall. Tony Boy's electric co. had all the city contracts and more. In fact the longest federal MOB trial in history was in Newark and involved guys from the Luchese Family, into 1988. So, it may have begun to fade like you pointed out but it was well into the late 80's early 90's before the real influence died down.