I was reading in another thread about E3 spark plugs. NGK IR plugs were mentioned and some people raved about them. I didn't want to high jack the thread with this question. Ford modular motors are picky as to what plug goes in them and I have the same ones in there now as came from the factory. I'd like to try another plug in hopes it would be a bit better ever so be it. Changing plugs on these engines aren't like others and are difficult so I would like to know if any one has run these in their modular motor and the results.