I need to know the proper way to reset the timing on my montero

http://i1146.photobucket.com/albums/o538/nycain/IMG_20120326_171526.jpg

I've gona a different direction with my build so I no longer need this MSD box. I had customized it so it looked more like a factory part. Works perfect. Wires are all set up for install in a SQ. I'm including the 2 rubber mounts I used. Drill 2 small holes in your relay tree and this bolts right in. $90 shipped     http://i463.photobucket.com/albums/qq352/ucw458/For%20sale/DSC03955.jpg http://i463.photobucket.com/albums/qq352/ucw458/For%20sale/DSC03954.jpg http://i463.photobucket.com/albu

i need to wire a horn to my car n how manny do i need to buy n wire up