Hi, I used a zx5 about 2 years ago and found the main things to change were the plastic wishbone carriers to alloy ones, the front shock tower to a carbon fibre one(atomic carbon made them 3mm) and the shock tower mounts to alloy ones, if I remember right the law35 was a rear end conversion, shorter wishbones and longer hub carriers with some slightly modified shock seals and rods+ driveshafts but you won't need that if you are just using the car at club level.
Also when you search for parts try worldwide as I got the alloy parts from america at the time
