Brake Improvements - Looking for thoughts

72 Duster 440, 4 Speed 215s up front and 315s put back.

For front brakes I am running the SSBC 11" 4 piston disc conversion, which I think just use KH calipers, with their upgraded pads, it have a set of Power Stop pads ready to install.

A153 Front Disc Brake Conversion Kit, Mopar Non Power


For rear brakes I am running the Dr Diff 10.7" Cobra disc conversion with Powerstop pads.

Mopar 10.7" Rear Disc Brake Kit


I have the 15/16" non-power master from Dr Diff as well and do not run a prop valve.

Mopar Aluminum Master Cylinder Kit


The brakes don't seem to bite as good as I feel like they should. I am not able to lock them up, I'm not sure if my leg is too weak, or the brakes aren't working at 100%. Slowing down from 60 seems to take forever and almost has the feeling of glazed over pads, which they are not.

I have bled them multiple times, and there are no leaks. I'm not sure what to do to improve the braking. I don't feel like I should need a bigger setup, but maybe my parts are mismatched?




Anything I should look into to improve their performance?