How does the injector come out? I took the two nuts and plate off. The return line would hit the studs if turned. Do the studs come out first then it turns out? The studs only have threaded portion available to put a stud removal tool on.
With the supply and return line removed and the plate/nuts off it should pull out.
If it has been in there a while you may have to put some PB Blaster on the injector body....let it sit and tap slightly on one side then the other to loosen it. If you can get a pry bar under a lip you can gently use pressure/tapping to pop it out....just ake your time...don't go a wailin on it!!!!!!!!!!!!!!
When you put the injector back in...put some never seize on the body