The good news is that with todays technology, a 6 banger can make the power that a V8 did back in the 80's and early 90's and get good mileage. I'm starting to see more six cylinder powered rods; Rod & Custom ran a feature on a 36 Chevy with a blown 3800 from a late model Grand Prix. Very slick setup and he was knocking down 28mpg. That early 90's blown V6 T-bird is a pretty cool setup, too.