With my old/tired slant (1-BBL), the Dart ran 20s
With the 2-BBL super six and headers it ran mid 18s.
With the new engine (4-BBL, mild cam, forged pistons, shift kit, headers, etc) it runs low-mid 17s. Mind you these numbers are all with 2.76 gears and shifting at 5 grand. I add a 3.23...