Max MPG- slant vs 318/340

You probably could not do this today with our drunk gas, but ............

in the early 70's I swapped a 71 hi compression low miles 340, with headers, into my 70 RR 440-6 body, so this is a heavy car..............3.54 Dana, A933 18 spline box, "trak pak" suspension, and hang on aftermarket A/C. All that crap adds up..................

I had various carbs on it, everything from the original TQ which had problems, to a QJ, and Holley SB. That thing would get 17.5, and I was never all that careful a driver. More careful driving could have wrung more out of it.

My present Dart, when I had the AFB on the 360, "touched at" 17, but I don't drive it on long trips. I also don't drive it very carefully. At the time it had (Ford) 3.89 and 28+ " rear tires, about 3200 RPM at 70