General Motors Part Number 1371797 Brake Pedal
4.625 PEDAL, Brake
64-66 F85 S.T. (1972 Olds Parts Book)
1965 30-4000 C.T. (2nd Type) (1967 Buick Parts Book)
1966 Special-Skylark-G.S. C.T. (1967 Buick Parts Book)
1965 Oldsmobile Cutlass/442 Assembly Manual (Page 5-2.3)
1966 Oldsmobile Cutlass/442 Assembly Manual (Page 5-2.4)
Factory correct applications are your responsibility. GM made part and part # changes with no rhyme but a reason (no production interruptions at any cost).
Application charts are for replacement parts that were available at the time of parts book printing, and when possible model specific assembly manuals.
My observations come from the parts I have in my collection or other reliable sources your parts may differ.
If Factory correctness is your goal, do more research, join car clubs,
forums and buy an assembly manual if one is available for your Project Car (you wont be sorry).
This is a fun and interesting part of the hobby!