I too am working on a 3/4. I bought a 1/2 ton front axle and order a bracket kit from CPP.com. That will accept 70 camaro rotors and calipers; I'll get them locally. The rear end and axle I am taking off. I found an 81 firebird rear axle assembly at a junk yard. The width matches and I will have a local shop match the spring bracket positions and weld for me. Then I will have good drum brakes on the back and disc on the front.
