so as of right now i have a stock GT and i put 87 octane gas in it...in the near future im making a short ram intake, buying NGK plugs and 8.5mm wires and gettin a PCM tune...so my question is would it be better for me to switch to 89 octane gas once all that is installed, or stay with 87? would it matter? and what does everyone run on modded GTs?