Ok I am getting ready to do my plugs and wires. I have been doing some reading on here and I thought I had made up my mind with the autolite xp606's. But Now i started reading about colder plugs. I don't have a pulley drop yet but plan one as soon as I get the supporting mods done. (don't want problems with KR). So My question is should I just put in the 606's right now or should I go with something colder right now.