Stainless Steel brakes has a conversion that will work with a 14X7 wheel. They also have a 4 piston conversion that will work also. Down side is that it currently is not compatible with most sway bar setups. Especially OEM.
Kits for the rear brakes can be found in their street rod section where they list kits for the Ford 9" with 28 spline axles. They will be working with me on the conversion of my 60 but I am planning on using a 17X8 wheel. I will update after I do the swap this fall or winter.
You will have to change the master cylinder and add a proportioning valve. This all comes in their kits which are the most complete on the market. You can go to SSBRAKES.com to look around at their products. Just enter your make, model, & year at the top of the page.