Juujai wrote:front brakes and rear brakes dont have anything to do with each other you can mix and match all you want.
Um, what about something called brake bias??? Don't think it makes a difference? Why don't you
All About Brake Bias & Big Brakes
Example: having wilwoods in the front & stock in the back w/ stock master cylinder (or almost any cylinder that doesn't allow you to dial in your own custom bias) is not fun... or safe for that matter.
For Juujai's case, he will be ok w/ 300zx rears since the fronts are essentially the same (minus the rotors) w/ a z32 master cylinder. He'll have ebrake in the rear w/ the 300zx or equivalent drum ebrake conversion.