Whoever told you that a 1976 A body automobile uses a 11 3/4 inch rotor is blowing a lot of smoke at you.
That statement is totally incorrect, and you are giving out false information to the readers of this posting.
All the 73 to 76 A body cars use the 10 3/4 inch rotor. Nothing else, no exceptions.
None of the A body cars used a "big" rotor.
If you wan't a taller rotor you find them on 1976 up Cordoba, Magnum, St. Regis, Newport, Fury, body style automobiles.
