I am in the process of doing this conversion on my S14 as well, however I am using an EVO front and STI rear. The last components I need to buy are the brake lines, and I am still uncertain as to what is the best to use. As far as I can see, a stock line will work in the rear. The banjo fitting fits within the guides, and the inside diameter are both 10mm. I am assuming that the length will be okay, as the caliper position is only slightly different.
I will not use a Z32 conversion lines in the front, so I need to find out if the stock front lines will work for the front.......help
Stock rear lines (left) vs Stock STI line (right)
Stock line on caliper
