Anti-Lock Brake Conversion?

You need to add the tone rings and pick ups. The rear end is reasonably easy to do, even easier if you use a ford 8.8 or modern 8 1/4 that already has a tone ring and pick up. The front wheels would be a different story. You would have to fab something up, it would be difficult with the design of the older disc brakes.

The rest should be reasonable easy to source from a modern vehicle and would require some plumbing and wirirng.