I've read all about the 250 kit. So far I haven't been able to find anyone who has installed it. I am considering ordering this from you after I get more information. Also I am a back yard mechanic. How hard is it to install the injectors on the crossfire. I had trouble with a mazda. Getting to them was a pain. Seating them without leaks was tricky. Do you send complete instructions. Or do I need the crossfire repair manual. I already have the sprint booster that I purchased from you.