I recently discovered some disturbing info with my 2007 expy limited. I was expecting to have the long plugs that everyone has breaking off, however when I removed a plug it was a 5507 or NGK PZNAR6A11H. That seems awesome however everything I can find says these plugs are for a 2008 expy with brown boots. However, I have a 2007 with black boots?????? I have called ford and they have no record of my motor being swapped. So now what?? Thanks for any advice.