We're watching as a 1971 Plymouth Duster 340 and 1970 Buick GSX duke it out on the drag strip in the following video. Which ...

A one-owner car until 2013, this 1972 Plymouth Duster 340 is one of the finest time capsules out there. It's numbers-matching ...

Conversely, the Plymouth Duster 340 is a rather common rig ... a hood tach, black stripes, and color-keyed headlamp bezels, but the "GSX" badges alone didn't make any changes under the hood.

Today, it means that on average, a Demon 340 is nearly ten percent more dear than a comparable Duster, with the Demon’s average sale topping $50,000 for a ’71 and $40,000 for a ’72.