9in coversion to Disk kit.
i am pretty new to all this car stuff myself but after doing some research, i determined that for me the best solution was to find a 73 or later a body and use as much from that donor car as possible. after researching the costs of everything for a disk kit and the work involved. i was able to find a complete running 76 with a 318 (so i can get rid of the /6) with some mild bolt on hop-up parts, disks in front, bigger drums in back, bigger rear axle, etc for about 100 more than a new disk kit alone.
course it took time and effort to dismantle it and i have a good sized garage and most importantly an understanding wife. but if i can do it anyone can.
good luck.