The DOJ files concerning Family Secrets have trascripts of Joey "the Clown" Lombardo and Morris Schenker discussing monies owed to the Outfit by Schenker. Joey is basically telling Schenker to pay up the money he owed. The converations give true insight into the inner workings of these guys:

May 22, 1979 Intercept 2 Intercept at AIA between Lombardo, Dorfman and Shenker http://www.justice.gov/usao/iln/hot/familySecrets/2007_06_27/may_22_1979_t2.pdf