I want more power. I ride mostly trails but have alot of open feilds where there are alot of raptors and 450s wanting to play(they all want to say they beat a banshee). Looking to spend 3-4 hundred. What should i get? Thinking about shaving stock head and ? Maybee aftermarket head and what? Any sugestions? 64.5 Weisco pistons, Hot rod crank, Bills pipes, Fmf power core silencers, Uni filter, no snorkel, Jetted rich.