Must be the first plug change. Well, you pull like hell while you move the boot side to side.  I take the radiator lose to save my hands. I have changed to Iridium plugs hoping to only chang once ever 3 years not every year like in the past. Silicone spray the boots on the inside and anti-seze the plug should help on the next removal. not much torque 8 ft lbs, I use a small inch lb torque wrench I slip on to the wrench after I get the plug in finger tight, use 96 in lbs.