Just to put another point on the subject of "power = poor fuel mileage"....
I have a 1969 Ford F100 'Ranger' truck. It's a swb with a 4sp toploader transmission (non over-drive). Under the hood hides a mildly overbuilt 428. The truck get's 21 in town and nearly 29 on the highway (If I act my age).
That's quite a bit better than these trucks got stock, even with a 240 six and 3sp + OD.
She's built for torque! She (was, this was before the rear gear swap) put 578 HP down at the rear wheel on the dyno..... but 767 ftlbs of torque.
So how do you get mileage outta that???
If it's built for torque, gear it for torque! It's now got a 2.0:1 rear gear and the skinny pedal is for goofing off. I don't need to come close to revs to drive, just to play and well, I don't do that so much on the open road as I once did.
On the other hand, if I had an engine built for HP and low Tq, I'd have to run a taller gear set (lower ratio) to reach the useful "power band" of the engine for standard driving.
Sorry for the lecture, just can't believe how much common knowledge is lost to younger generations these days.
Another myth? ETOH runs fine and produces plenty of power (just turn the timing up to take advantage of it). LOL guess what line of "work" I come from. [DON'T GO RUINING YOUR CARBS, IT'S A 'JOKE']