Would a 1992 Z24 cavalier hood fit on a 1989 z24 cavalier?
no it would not fit it would either be to big or to small but it will not fit on a different model
Stick a long screwdriver between the hood and the the small trim piece in the front middle of vehicle and try to locate the small latch that the cable would pull if it was there. It will take some force but push it to the right when facing the front of the vehicle. After this disengages then you should be able to open your hood with the finger latch. A flashlight helps.
The easy way to open the hood manually on a 1998 Chevy Cavalier, when the cable is not working is to put the car on a hoist and use a long pole to trip the hood latch. Then lower the vehicle and open the hood the rest of the way. Replace or repair the cable for the hood latch before closing the hood.