2004 V6 3.9L had 95k miles on it. Runs good but want to look into adding some powerpaks that would include ported upper and lower intakes, billet cams and ss valves from someone like supersixmotorsports.com. Anyone have experience with them. I am looking into getting some available funds but wanted to check out anyone elses serious power adds. I also wanted to find out if my engine was to old and needed to be overhauled first. Runs great now and no leaks, etc.