I have a 331 with afr 185 and comp xe 274hr cam and a ported gt 40 lower with comp polymer box upper 30lb injectors 76mm MAF. Had it dynod last year and made 345rwhp at 5900rpm and 347 rwt at 4200rpm. Tuner told me that he thought my intake was holding me back. Thinking of switching to a holley or a tfs r intake and curious what you guys think i could pick up by switching from the box upper and ported gt 40? Also from switching intakes will my power band change much? And will i have to get it tuned again?