I recently attempted to change the plugs on my 5.4 Triton and being inexperienced with Tritons, it broke. So I spent $360 to get it removed due to the extraction tool not working. It still runs rough and needs the others changed. So my question is, what are some tips and tricks I can do in order to change the other plugs without them breaking?
Thank you in advance.

 

I do not envy you. Here is the TSB that Ford issued on removal procedures.