I just upgraded my brakes to 87-93 spindles and calipers that i had laying around...When i slam on the brakes the pedal stops halfway down and feels like a rock... what could that be? It slow me down but not as much as it used to. Could it be the master cylinder isnt strong enough? If so where could i get a direct bolt in that is more powerful?

 

sure their is no air in the system or a brake line is not kinked or pinched

 

I bleed the **** out of them.. but i guess ill try again.. its raining now so ill have to do that later... not sur if they are kinked.. the car rolls straight when i use the brakes..

 

I've heard that if you don't change the master cylinder when you do the upgrade that will happen. I guess it's true