just curious? other than the plugs needing changed why did you go one step colder?

I'm all about economizing on things that don't matter...but your tune isn't one of them. Your best bet(bang for your buck) will be Uprev or a used haltech. I like both, if I had to tell you one is better than the other I'd tell you to find a used haltech bc it's more congruent with standard tuning practices (and not to say Uprev is bad or inadequate)

 

The one step colder, its for something I didn't mention :P, I read a lot in the forum and I'm planning on supercharging it around September, just enough time to save up some $$$. so I taught why not buy the plugs now... It'll motivate me even more to do it. Any taught on this ? things to avoid or recommend ?