Yeah unlike the 5.4 the 4.6 does have what you would call "normal" spark plugs, with the threads going all the way to the electrode unlike the tapered shaft of the 5.4 liter. They only one who makes a sparkplug that is a 1 piece is Champion and they are 18.99 a piece!
What mileage are you guys getting with the 4.6? My drive is mostly open road but not highway speeds (I go around 50 -60mph). And are there any decent upgrades to improve mileage besides the usual intake and exhaust with a tuner? Personally I wouldnt complain about getting 15 mpg with a truck because it's a friggin truck and isn't made to get 20+mpg but it would be nice to get around 18 or so. I would just like the fact I only have to fill my tank up once durring the week instead of twice because my cars tank is only 16 gallons