I can't speak to the '67 specifically but I did this swap on my '69. I used the spindles, discs, proportioning valve, tie rod ends, and rubber brake hoses from the Granada. I used the booster and (dual reservoir) master cylinder from a Mustang. I had the hard lines made by Classic Tube. It took a few tries but they eventually got me the right lines (customized due to the 'mixed bag' of parts I used). You will need the brake pedal from either a power brake mustang or cougar. The manual pedal is not the same and should not be used. I am not sure but I think it has to be from a car with equivalent transmission (manual or auto) so it will fit the under dash bracket you have. I got mine from West Coast Classic Cougar in Portland, OR (salvage yard for Cougars).
Many people swear that you need to use an adjustable prop valve but I have found the Granada valve to work fine. I do notice that under very hard braking that the rear tires will lock up slightly before the fronts. If this is a concern, the $50 for an adjustable valve may be well spent.
It looks like National Parts Depot has a lot of this stuff in their catalog.
I've got to say, out of all the cars I have worked on and driven, I am most pleased with the brake feel of my '69 Mustang with the granada conversion. Nice and solid without being 'grabby'.
Good Luck!