bahh all of those intakes are emissions legal so long as they dont pop the hood and actually know what an EGR looks like.
Oh, and you would need a proper tune so code 32 doesnt pop up...
If you are running a 5.0 computer I would definitely recommend tuning to reach the potential of this combo, and upsizing the injectors so they don't become a restriction point. After all, you are bringing more air into this engine, you need more fuel to match.
Stock radiator is fine, and if you are worried about it running cool a low temp thermostat and tuning will help that as well.
If/when you are ready to tune give Josh @ JS a call and he can give you a quote.