Smallblock efficiency or How to have your cake and eat it too

I run a 340 with everything RAMM has talked about so far except my cam is [email protected] (to small and upgrading soon) and an A999 low gear set. I burn 7 gallons of 93 driving 100 round trip and run 5 1/4 mile passes. I've never checked mileage just cruising.
Following.