Just as a warning, moving and/or disturbing the return caps while changing out the lines will likely start them leaking next. It seems if you just look at them funny, they will start leaking.
My two cents......... get a complete kit and forget about it. Don't get one from a chain store like Autozone or the like. They'll charge you way too much. Get one from Mel, Russ, Diesel Injection Service, or the like.
Heath