You normally need a colder tstat with a tuned PCM, how much KR it eliminates? it depends on how aggressive the tune is. I get 0 KR at 85*C ECT and up to 2 KR past 90*C ECT with my current tune.
You also need to switch to AL104s when you drop pulley size and the N* TB won't help at this point, plus you would have to tune specifically for it. You may want to spend that cash in something more useful like a KR scanner.
If you're getting a Gen V assuming you get a tune, colder plugs and Tstat you could run a 3.5"
