Randy,
With only a few exceptions (47 amp alternator and C.A.C on the Corvair, 62 amp alternator on all models and transistor ignition on the Chevelle), all cars equipped with the externally regulated alternator from 1962 through the early 70's used the 1119515 regulator. Your 61 amp L48 with C60 would also have used the 1119515.
Ed