I'm showing pictures of components needed for a D30 drum to disk swap, using factory Jeep parts. These are the D30 disc brake components from a 1976 thru mid 1978 CJ model using 1-1/8" thick rotors; this also utilizes 6 bolt locking hubs or drive flanges. If you had a 1972-1975 drum brake set-up, this is what you would need to convert. Of note are the factory wheel hubs; notice the backside factory machining for the mounting of the rotor on the inside of the wheel hub. Also note the often referred " 6 bolt" caliper mounting bracket and dust shield. The last picture shows assembled view more or less for reference. If you are junking a yard, then you can see the component part numbers and compare. I know this is for D30 conversion; maybe the wheel hubs and other parts would work on closed knuckle design as well. Do your own research. Hope this helps someone. Moderators move it out of here if you desire.