i am getting that 530 kit from FST,with the 11:1 piston and porting, do you guys think i need race gas? if i do i might get the 10.5:1 piston instead, in the magazine he says they run a mix of super unleaded and race gas to be safe,but i dont want to have to find race gas all the time, would it be a huge drop off to go from the 11:1 to the 10.5:1 piston?