basically i purchased an 88 mazda rx7 and the 13-b rotary engine is missing almost all if not all the vacuum lines. it runs fine just really rich and if anyone knows a good link to an online diagram please point me to the right direction! its my dream car and it can smoke the competiton from any of the rice burners in my town. and when i roll the manual window down ive seen many a surprised look when they see a Native American Kid driving it lol.