Disc Brakes on Early A's - What solution did you choose and why?

Disc set up and manual master cylinder from 73/76 A body. Add a proportioning valve to the rear line. I chose this because it all works together nicely and is as close to stock for the large bolt pattern as you can get. Replacement & wear parts are cheap and available everywhere, only obstacle is the steering knuckle, upper control arm, and caliper adapter. Some folks use the later model F and M body knuckle/adapters and report good results, despite changes in steering geometry, which are apparently slight enough not to matter. F & M parts are not hard to find & cheap. Some outfit called magnum force (I think) used to make tubular upper control arms as well.