sb difference fuel consumption
Mad Max2
I would use your Edelbrock heads and RPM intake and the 600 DP Holley with the 2.87 gears.
Those cams I would not use. I would seriously look at a smaller cam for daily driving. I would seriously consider the Comp Cam XE262H with dual exhaust at a min. and headers a serious plus in power/mileage abilty's.
IF I had my choice in engines, it would be a 360.
Are YOUR 2 choices a 318 and a 340? I would do the 340 then.