[AuburnRyan]

OK I'm going to throw this out there for verification, since it's been an issue of contingincy (in the past) on the z32 front swap. Please correct me if I'm wrong or you have additonal info.

Stock 240sx brake bias is ~70% front.

Switing to 300zx front calipers ONLY yelids ~75% front bias.

Switching to z32 fronts and rears requires z32 MC change for correct (not mushy) pedal feel and to prevent on/off lockup - the larger the MC the firmer the pedal.

No need to swap to a larger master cylinder for a z32 fronts only swap. I personally had no issue with 26mm rotors/calipers on a (slightly larger 7/8) ABS 240sx Master Cylinder (Sold the car before I made it to the track with this setup to really test it out- but the pedal was fine and like stock).

Assuming all I posted above is correct, I'd upgrade only fronts first. Should provide all the fade resistance you need with decent pads front and rear, and you can keep the stock parking brake setup.