Recommended 4bbl carb for stock 318

I'd like to see a shot down the primaries; does it have a triple booster up front. Dang I coulda used that on my mileage testing combo; I bet that combo coulda gone better than 32 mpg. I even have a smallport intake I couldda slid under there. I was thinking an old Offenhauser Dualport. Man I'd build a 360 combo just for those two items. Aluminum heads and 200psi, double overdrive and 2.94s;65mph =1270rpm,lookout!!
At the tail end of the years when American cars were big boats (1977) I worked at a Buick dealer. The ole Electra 225's and Park Avenue's with Quadrajet powered 455's would get late teens, almost 20 mpg highway. It can be done. Those old engines had more torque at idle thatmost engines have nowdays at 5000 rpm. LOL