The '66 shares it's booster with:
Buick Special, '64 - '66
Olds F85 '65 - '66 field inst.
Tempest '64 - '65
The master cylinder appears to be much more generic, so I will only list a few:
Buick Special, '64 (power brake), '65 - '66 (std. lining, power brake)
Chev Pass. '64-'66 single cylinder, std. lining, power brake
Most Chevrolet Trucks ('64-'66) with with 1" diameter cylinder, Moraine
Chevelle and Chevy II "64 - '66 std. lining, Moraine
Olds F85 and Tempest similar to the Buicks above
Looking for chrome, of course the Chevrolet ones will be the best description to look for.
The info is from Hollander.