Have you searched and read this yet? This is what I used years ago. It helped me then and its STEP by STEP with pictures. Doesn't get any easier than that.
http://importnut.net/300zxbrakeswap.htm#rearbrake
This is on a S13, SAME deal, but he shows more pictures if you need them.
http://forums.nicoclub.com/s13-300zx...l-t277821.html