When I ordered my tach from charger specialities they told me that the early barracudas had the same tach except the font is different. Look at your instrument cluster and figure out what you have. All 70 and up cars had a 150 speedo.

The rallye tach only fits a factory rallye dash equipped dart (340 only). It won't fit a standard 318 or slant six car, and those cars never had a tach to begin with.