You ned to rewire the green wire to the secondary injector (light green) on a n fdrx7. You do not want to tap the greddy elbow as it will strip because the aluminum is too thin to support threads. Buy one of these
http://www.howertonengineering.net/p...Weld-Bung.html and have it welded to it for long term use. If you buy the bung also purchase the plug
http://www.howertonengineering.net/p...king-Plug.html I just did this complete system on my fdrx7. G