/6 or v8 swap?

Id rather take the mileage hit...slight...and have the extra torque
I can't argue that. I tell my son all the time to build his car to enjoy driving it. That it should be smiles per gallon over mpg. When I ask my wife she says "do not build it like its your car." And bad milage is out of the question. I say if it's just a summer cruiser who cares about milage. And I think to myself that I have never put much emphasis on a /6 and it might be a fun project. But, then hp is important too. What to do? Decisions.