The Stovebolt Site Forums The Shop Area Engine Shop 292 .... Viable swap for older trucks?

I am thinking about a 292 myself. I have noticed they have a reputation for bad fuel economy. Has anyone here built a motor that enhances these engines low end torque and put an overdrive box behind it to get the revs down around 2000 at 65MPH. If so did that help with the economy?

Thanks
Steve