While technically true, I think you’ve oversimplified a bit.
To run the hood, you’d need the hood latch panel, the grille, the lower grille panel, the bumper, and bumper brackets. And installing the grille and headlight surrounds will require adding some brackets and holes not found on the later cars.
And there are additional caveats to some of those, like, depending on the build date of the ‘74 the frame rails may not have the mounts on the frame needed for the earlier bumper brackets.
Basically it’s a full front clip swap, minus the fenders, which need some minor modification to mount the grille and latch panel.
