Need help again

Mike,

You'll need to replace the distribution block on the fame down by the starter with one from a dual master cylinder car. You'll also need the (2) lines from the master to the distribution block, and probably the lines from the distribution block to the front brakes. If you're handy with a tubing bender, you can buy lines in straight sections at NAPA and bend to fit. I think you can also order pre-bent lines but that will probably be expensive.

In any event, take a trip to a junkyard for the distribution block and look at how the lines run on a 68-up A-Body. In fact, take all the lines from this parts donor. If you are lucky, you may be able to use all the later lines on your 66, or at a minimum, you'll have a pattern for new ones.