I am looking into the VMP 500hp kit for my 08' Foose F150 after changing the fluids and putting in new stock plugs. Does anybody have any experience with the kit? I searched but really can't find much on peoples gains/reactions to it. It looks like a easy way to gain a good deal of power/drive ability. I just wonder about the possibility of belt slip since it is just an upper pulley as well. Any input out there?