Yeah. Gee... Salerno suffered a stroke in 1982. So I figure Chin was made boss sometimes right after Salerno´s illness.
There was a thrid player also. Philip Lombardo. But he seems to have retired sometimes around 1981 and moved to Florida. Lombardo (who I believe had functioned as boss during the 70s), could have briefly served in an acting capacity for some months or so, before Chin took over. (Perhaps)