I have some thoughts, but please be advised, they're probably not what you want to hear. However, you asked, and we don't blow smoke up anyone's butt, so here ya go:
Z32 brakes are phenomenal - even 30 years later, they're STILL used on TONS of track builds. If you're able to lock up your front wheels, bigger brakes aren't doing a thing for you. In fact, I suspect your tires are the weak link (99% of times, that's the case). All those calipers are going to do is screw up the braking balance (and add weight).
In fact, the swept area (surface area of the rotor contacted by the pads) doesn't look to have changed at all. Did you go with a bigger rotor? If not, pull those off and sell them - they're not doing anything, and any real car enthusiast is gonna see the overhang and wonder WTF you were thinking.
If you want massive calipers for the cool factor, I get it - but you can't be "pissed off" if they don't play nice with your wheels. That's simple physics. You've gotta run the same diameter rotor that those calipers were designed to work with, also... and you're gonna need bigger wheels, plain and simple.
I realize that may all sound brutal, but bad info isn't what we do here. That's what Facebook is for.
p.s. Would like to see more of that Z!