Jim,
According to information from the Engine Rebuilders Handbook, The 1196914 was used from 1959-1966 on the Buick 364, 401 and 425. It was used for more years on more engines than any other casting.
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Steve B.
GSCA #2173 (1986)
67 GS 525 Stg IV
66 GS Convertible
65 GS HT
63 Riv
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