As general comment, with the Wilwood calipers, I think you will need strong assist. They have smaller than OE piston area and need plenty of line pressure like the Cobra style calipers I run on an E. It would be hard to get a manual bake setup to work well. It is hard even with the large area of the factory single piston calipers.

I upgraded to a double 8" booster and 15/16" master to get enough line pressure for full braking wihh my Cobra setup. I am considering "some day" upgrade to hydroboost for the more compact installation and additional line pressure capability.