The steeda kit is for running a bigger belt so that u don't have belt slip or breakage!! That's it. What made me get the steeda kit is I wanted the 20lb pulley set the offer and that I actually put the SC on it's OWN belt system not sharing anything with the alternator power steering and a/c.
The kenne bell is a 2.6 liter I believe. And the port cost me 800 bucks from Stegemier. The specialize in porting out cobra's supercharger, but will do whipple's too. U just have to ask.