Hard pedal

BTW, I just read that you're going to rear discs. Someone posted on problems a couple of week ago with an issue with them; the standard MC's did not have enough fluid stroke capacity to activate 4 wheel discs. There was another situation like that a week before.

Wilwood/Strange 4 Piston Calipers soft feeling pedal

And not to pile on, but keep an eye on your pads with those slotted/drilled rotors; they can eat pads very rapidly.