Bigger rotors only give more leverage if the caliper is moved outward.
The most important thing to fight brake fade is good fluid. When you push the pedal and it feels like the pads are just sliding on glass, but there is resistance. Your pads suck.
If you push the pedal and it goes to the floor. You're boiling your junk brake fluid out of the caliper. Replace it all and use a higher quality fluid.
From there, in all honesty, if you have the ability to lock tires at any speed you will see. Upgrading the brakes does nothing. The problem is avalible traction.
Drilled rotors are moronic.
Slotted rotors stop slower than blanks unless you're melting the pad face - which is not to be confused with boiling your brake fluid out, are more expencive, and SIGNIFIGNATLY decrease pad life.
Hard brake lines make a "differance" when your normal lines are completely shot.
Without even changing calipers, you could always try to find a bigger, stronger assist & master cylinder and bend your brake lines to fit.
AFA will they swap. I don't know, ask on mr2oc or mr2board. If you've not figured it out yet in the tighter communities, all the same members frequent all the same forums.
If nothing else, grab a caliper, a rotor & see for yourself. It's not that much work to take a caliper off. especially if your brakes are currently out anyways.
