I just ordered the JE 434 big bore kit 39mm fcr kit from TT stage 1 intake and exhaust cams mcct I'm going to put this on a 2009 S model along with a MRD I already have. I live at 800 feet above Sea level. Should I do the E gasket swap when I do the rest of this ? Is there anything I'm forgetting ? Thanks in advance, I truly appreciate it.