To be honest, my first Challenger was a 1978.
It had a 2.6 liter Japanese engine. I wasn't real impressed with the power, or gas mileage... although I can't throw a figure at you.
I liked the car though. It had a pretty much useless back seat too. I only sold it because when I moved further South, I about died because it didn't have AC.
Nice plaid black and gray/red seats. Overhead console. Really, if it had AC, I would have kept it.
You hardly ever see these cars anywhere. I know most people frown on them, but if it is fixable....
Mike