Originally posted by Turbo6inKY
There's an article over on GNTType.org on converting to Vacuum brakes. You basically need the TTA vacuum block, the booster/master cylinder assembly, and the pedal from the donor car.
You should probably also install a one-way check valve in the vacuum line from the block to the booster to keep boost out of the booster (think I used 'boost' enough in once sentence there?).