Monday Wall Street Journal has a front page article on getting better MPG from pickup trucks. Author of article seems to believe that simply putting a very small cubic inch engine in a pickup is the majority of the effort. Almost no discussion of gearing and transmissions.
I’d bet a 440 would get better mileage in a fully loaded c-body, than a slant 6 would, all other options being the same.
526 cubes of angry wedge, pushbutton shifted, 9 passenger killer!