Upgrades to improve braking

That's probably the problem right there.
I've had 1-1/32" MC with power brakes on my setup. I also have 2.75" calipers and 11.75" rotors and braking was just so-so.
After I installed a 15/16" MC braking has become much better and like it should be.
Would the 11.75 rotors and 2.75 calipers be a better fit with the 1.031