Anyone know what kind of gas mileage a mildly built 440 with a 4 barrel would get? Also interested in knowing the gas mileage on a mildly built 383 4 barrel. I am wanting to put a big block 4 speed set up in my 68 coronet. And I have been looking at some EFI conversion kits for it. I found one from Mass-flo efi that you only have to hook 3 wires up to your existing wiring harness and it tunes itself. This is going to be my daily driver when I get it running and I'm trying to get away with some decent gas mileage. I think running a fuel injection system may really help with that. I was just curious as to what gas mileage a big block gets in general. Also I am asking how good the gas mileage is when a guy can keep his foot out of it try to keep the secondaries from opening up to often. And not roasting tires at every stop sign and traffic light lol. And how much worse is it than a small block?
