It doesn’t apply to this set up, but be cautious buying a BBK that includes discs intended for an E46 M3. The track rod ends on the Zed are more outboard than they are on the M3, so the Zed needs discs with different disc hats to prevent them fouling the track rod ends. I found that with an Alcon M3 BBK. Fortunately, I was able to get a full refund.
Also, you might find that the M3 calipers need shims to fit. I have E46 M3 AP Racing calipers and, whilst the rears fit, the fronts need 2mm washers as spacers.