I have a 360 with auto trans. I'm not sure what rear end gears I have. I have a 4 barrel Edelbrock carb. Is there such a thing as a fuel efficient carb? or should I be looking for higher gears or overdrive to get better gas mileage? I'm planning on changing to a 8 3/4 rear end with 3.23 gears .I currently get 9.5 miles a gallon, mostly freeway driving. The RPMs are about 2700 at 65 mph. Thanks
