RPM's

Quick run down of my specs.

360, xe268 cam, magnum heads, air gap, Holley 670, TTI's, 727, 2800 stall converter, sure grip with 3.73 gears.

I've noticed that driving 60 mph Im close to 3k RPM going down the road. At 70 around 3500 RPM.

If I kick my car down to WOT I can literally almost watch the gas gauge drop. I know my fiance has made comments about it moving when I've punched it. I also get horse **** gas mileage. I know the car was not made or engine built for fuel economy but seriously I can only get about 80 miles for 3/4 of a tank of gas if Im heavy on the throttle. I've only put about 150 miles on it and 2 tanks of gas so far this summer.

I've been debating about picking up another center section or just putting in 3.23 or 3.55 gears. Not sure what affects this will have on my particular set up, so Im looking for your opinions. Thanks