Once you're sure that everything is bled properly and you're running the braided stainless soft lines, if you still want to improve stopping power then look into a good set of pads and shoes. There's some good info on that subject in this thread:
https://www.gmt400.com/threads/ebc-yellowstuff-brake-pads-worth-it.47903/
Long story short, there's a two letter code stamped on every set of pads/shoes sold in the US which indicates their cold and hot coefficient of friction. Basically the higher the letter, the more aggressive the friction material, therefore the faster you'll stop. Raybestos and Powerstop both have good GG code options for front pads. The most aggressive rear shoe options I've found for the smaller 10" 10 bolt rear brakes are FF code.
Also some bonus info about performance brake fluid:
https://www.gmt400.com/threads/brake-fluid-recommendations.53269/