Has anyone done significant mods to their 4.7L and what are your HP gains? I have done all the standard "bolt on" mods except throttle body. I have been looking to install a blower on it (preferably a twin screw) and get about 400 HP out of the thing, but would settle for the mid 300's. I am not sure this is even possible. I would like to stick to a supercharger given all of the issues with turbos in aftermarket mods. I know many will ask "WHY?" - Let's just say "JUST BECAUSE" Yes, I should have purchased a Hemi and all that jazz so lesson learned. Any input would be appreciated. I have talked to Kanne Bell and they don't offer anything for the 4.7L