I wouldn't recommend Wilwood. Stick with factory parts, you'll be better off in the long run. You can get the correct parts from Doctor Diff. You need a firewall plate, the 4 to 2 bolt adapter and the new aluminum/plastic master cylinder. You might also need a different pushrod. The conversion would be a lot easier if you had a manual brake car since then you would have the correct firewall plate and the correct pushrod.

You should probably post this over in the general or racing section since it isn't a restoration topic. Adding a late model MC to an early car is restomod.