No.
No, the brackets & everything are different since the body changed that year. The 73 has that wide strip between bumper & body so the curved sides longer to take up the gap. I think wheelbase also changed slightly. The 73/4 are the same.
with the exception of the bumpers & bumper brackets they are identical
There are two;first one under front bumper; then one between hood & top of Grill.
I used brackets from 72 nova did a little cutting and they worked.
About 20 years.
Any other 1975-79 Nova front clips would work
Not quite, the 74 Nova had provisions for the shock absorbing front bumper in the frame horns which the 67 Camaro did not have.
Looking at the bumper, you will see raised, chrome, dome shaped, bumps. These are actually bolts, with a nut on the back sides. Then, it will just lift off.
There is a VIN located on the door post of the 1967 Chevy Nova. There is also one located under the left front fender that can be seen if the fender is removed.
Passenger side, front, lower on the motor.
chiltons repair manual for your year car at the library.