mileage
Add overdrive, plug and play fuel injection and choose your gears wisely and just about anything from the 50s - 80s will get respectable mileage. I had a 73 f100 360 that got 17+ MPG, 3speed, no OD and a 2bbl carb. My 72 454 Nova, TH400, 3800 stall and 4.10s got 11 mpg. what did that...