All my cars use ONLY Wilwood manual master cylinder... but they also all have disc brakes all around.
So here's the deal...
You have to actually lift your leg and place your foot on the pedal... it ain't the one big toe stop that most power brakes are.
As far as stopping power - I can throw you right thru the front windshield... but I have to use my leg and not my big toe.
There's a couple of things that Wilwood will tell you. A 7/8" M/C will give you more pedal modulation -- a 1" will be a higher and harder pedal. I only use the 7/8". I also use a 6 to 1 pedal ratio - which you'll have to change from your current 4 to 1 ratio (which is what p/b's use).
All the cars we build use only manual brakes, Rogers RedZed Camaro uses a wilwood 1" master and stock 69 camaro manual brake pushrod mounting hole using Baer 14" proplus front and rear and it is easy to drive on the street and work well on the track, the pedal effort is higher than a power setup but it also provides much more feel and is easier to modulate the brakes,. My Nova uses a wilwood tripple pedal set up with a 7/8 front and 1" rear master with baer proplu 14" brakes as well. it has a bit more effort than Rogers but that is how "I" like it.