With the mods in my sig, which way should I go? This car runs 1/8 mile except at the nats with an 8.5 best on drag radials and pump gas and 8.3 with 3 gals of 112. Looking for what will work best on pump gas so I can just drive in and have fun. I've had the car 5 years so I KNOW (right) that this will be my last performance mod. What improvement should I expect? TIA