S13's and S14's both need a conversion line to install Z32 brakes. If you get the conversion lines, it's simple. Much easier and less work.
I run Z brakes on my S13. I've done a few brake swaps, pick my brain. PM me.
I used Agency Power lines. Damn good quality. I've had a few of the eBay ones, and even some out of Canada, and none looked as good as the AP ones.