You can change pedal effort by increasing or decreasing length of the pedal arm. Both Wilwood and Tilton have suggested sizes on their websites. When I raced we used a 7:1 box. Haven’t checked the ratio on my ERA2045 but should. Car requires a lot of effort to stop compared to cars I raced which were heavier. As Franky noted if you go down in size you add a little extra stroke.
I dropped links from a couple of websites that might help you consider how you want to approach changes. More aggressive pads might be a good place to start.
https://www.joesracing.com/master-cylinder-math/
https://shop.wilwood.com/blogs/news/...w-to-find-them