I would be suprised if you're paying 3.99 for 116 octane.. if so i'd be carefull as to the quality of the fuel...
also, be careful of those who store the fuel in large steel tanks. You should see some of the stuff I pulled out of my motor when we drained the fuel system.. Water mixed in (condensation), made a real mess of my EGT readings and the plugs.....
picked up a special funnel that will catch water and let the fuel pass through....
it's helped out a couple of times....

oh and the other place on 66th is HoleShot Engineering..