I finally checked the mpg in my desoto while driving to Carlsile. I was shocked that it was 26mpg! It’s a .030 over LA roller 318 with magnum heads, 3x2 9super7 carbs, a reground roller cam(not big only .436 lift) block hugger headers and 2.25” dials with x pipe. It’s an 833od with 323 gears.