Looking for better fuel milage

At present I'm only getting 8 mpg in town and 10-11 on the highway with the rpm's never over 3000 and only on the front two barrels. Carb is a Quick Fuel 650 double pumper. I'm running 66 jets in the front and was thinking about putting a plug in where the power valve is to see if it gets any better. Engine is a 360 +.060 with dished pistons in the hole so compression is around 8-9

Car runs great but likes gas. My setup is comp XE 284 with roller rockers and flat tappets. An Eddy air gap intake and Eddy Perf. RPM heads. I have a 3.55
out back with a 2800-3200 convertor.

The 'Cuda is a cruiser with a 99 % of the time.

Any info would be appreciated. Gonna do The Power Tour with it in June so I wanted a few more mpg if I can squeeze it out of it.