HELP!!!!74 4 door cornet disc brakes

The knuckles will work just fine once you have the correct ball joints in place. The calipers probably won't because of the hose routing. You can hang the calipers to the rear and run the hard line to the front like the factory did on those cars and then the hoses will work but that is a bunch of work. Kind of depends on what kind of anti-sway bar you have. I don't see a rotor in the picture, was that an 11 inch setup or the larger 11.75?