Vibration in engine- help!

Talk to these guys, http://www.hughesengines.com/Index/...2LTQ0MCAoUmFpc2VkIERlY2sp&level1=RGFtcGVycw== , I doubt that you need the expensive fluid filled units. Also you can elongate one of the 6 pulley mounting holes with a rat tail file so it'll fit a symetrical 6 bolt dampener.