I converted my 78 300D W123 and my friend converted his W112. We both researched and built are own kits and installed them. Comparing the two mine was a whole lot easier than his becuase the W123 has more room under the hood to put your necissary components. The W112 surprisingly has less hood room and is very messy with the airfilter houseing in the front left corner. After all this the kit that I made was still a pain in the butt to install. Are you planning on making your own kit or buying a rediculously priced kit of greascar.com
-Stephen