I would think they should be the same. They were 9.5" drums, becoming 5-lugs for 1964 when the V8s became available in the Chevy II / Acadian lines.

Carl Stevenson wrote:

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GM says rear 64-75.

GM says front 64-68.

I can check Hollander interchange tonight.

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 The fronts changed for 1969 probably because of the fins they added for heat dissipation. They will still fit a 65-67. The rears changed after 1975 because the U.S. braking standards became more demanding for the 1976 models. Rear brakes on A-bodies became larger for 76, even Jeep CJ5 models had to be upgraded to front disks for 76, again as part of the more demanding new standards.