i have a 75 val with front disk brakes and the rotors are shot i cant find a donor car around but i do have a 76 volare with disk up front are they the same?? any one?

Yup. 73 up A body cars, F bodies (Aspen Volare), J bodies (Mirada, 80 up Cordoba) and even M body cars all the way to 89 (Diplomat, 5th Ave, Gran Fury after 81, Le Baron 77-81), all take the exact same rotor. Junk if they measure out at 0.940" or less.