since u mention u have wires i am gonna take the liberty to say u have the 4.6L. the wires are not that difficult to remove u just need a nice set of spark plug wire boot grabbers. i have a set of SK grabbers, and i have never slipped off of a boot when attemping to remove one in 3 years with them. kinda costly but well worth the investment. As far as a recomendation on wires, i will only recomend MSD Super Conductors. some ppl have reported them being short and having to reroute them, i have had no such difficulties. yes they are short but they seemed to fit just fine for me maybe others have gotten the wrong part number for them, my part number was 32229.
Your friendly, digitally local, ASE cerified mechanic,