Disc brakes

I 2nd 67Dart273. I'll add that disk brakes require more line pressure for the same braking. That is why even the smallest cars today come w/ power brakes, i.e. a booster. You may be fine w/ manual brakes if you get an MC w/ a small bore (say 7/8"D) and have a strong leg. Dr Diff sells a kit to install a later aluminum MC w/ small bore (~$100) or rig your own w/ a 2-4 adapter plate ($30 ebay). I used a 99 Breeze ABS MC in my A's. You almost certainly will need a proportioning valve on the rear circuit. If not, your rears will probably skid before the fronts, which is bad (rear-end slides around). Test in a wet parking lot, braking on a turn. You can get an adjustable prop valve (has knob) for $30 or $75 for one w/ an imbalance switch if you want to replace your whole "distribution block".