Daily Driver.. LA318 vs 360 Magnum

@MopaR&D
My post was irrespective of emissions equipment. I'll wager not one in a hundred of us consider it when we hop our cars.
My post was comparing a well-built, alloy-headed, hi-compression, small displacement, V8 of yesteryear, to a similar displacement, highly regulated, over complicated, engine of today, in the fuel-economy arena only, and at about the same weight; sorry if that was unclear.
If I, a common uneducated country-boy hick, can get 32mpg out of a 6 liter 1960s tech engine; and modern cars are doing that but with 2.5liter 4-bangers, and it's 55 years that have elapsed, you gotta suspect something. And when you consider that this 6 liter makes 335 NA hp with just a carb swap, com'on; Somebody is holding back.

I understand your point but I still don't believe something is being "held back", you can de-cat a modern car and tune it to cruise at 17:1 AFR and pick up a bunch of fuel economy. I also know modern Corvettes are rated for almost 30 MPG highway so there's something with similar weight and engine size to your car getting that good of fuel economy. Your 32 MPG claim is pretty lofty as well, I don't think you're lying more just a miscalculation or something. Hard for me to believe but even if it is true nobody else has ever come close to that without a LOT of work. I'd almost say some of it was luck with your overall combo, not many others getting anywhere near that even in old Mopars that are purpose-built for gas mileage especially not with a 360. I remember a while back on Mofarts there was a guy with an A-body Barracuda who built a 318 purely for maximum gas mileage (with OD manual trans and well-matched gearing) and I think he just about broke 30 MPG.