The following information was contributed by Gene Fusco and Stan Aiton:

Year    Car          CID         Carb.         Hp       # Produced

1967  Dart GTS 383   383         4 bbl         280


1968  Dart GTS 383   383         4 bbl         300

      Dart GTS 440   440         4 bbl         375        ~50

      Dart S/S       426 Hemi    2x4 bbl       425        ~80


1969  Dart GTS 383   383         4 bbl         330       1989 
							  (820 manual trans.
							  1169 auto trans.)
      Dart GTS 440   440         4 bbl         375      

      Dart GTS       ALL ENGINES                         6702
                                                          (6285 hardtops
							    417 convertibles)
Notes

1. The 1968 440 wedge and 426 Hemi Darts were built by Hurst Performance
   to be used in NHRA drag racing.  Chrysler assembled the basic 
   chassis and delivered the cars with engine and drive train separate.
   Hurst modified the cars for racing prior to installing the power 
   plant and drive line.  Modifications included lightweight glass, 
   front seats, fiberglass fenders and hood, radio, heater and rear 
   seat delete and relocation of the battery to the trunk.

2. The 426 Hemi used in the Super Stock Darts was not the 425 hp street
   Hemi.  The Street Hemi was rated at 425 hp with a 10.5:1 compression 
   ratio.  The Hemi in the Dart was a more powerful 12.5:1 race Hemi.

3. The 1969 Dart GTS 440 cars were built by Hurst Performance.  All
   had 727 TF transmissions.

4. The production numbers for the 1969 GTS Darts are from the Chrysler
   Historical Collection and are provided courtesy of Stan Aiton.

References

The Best of Mopar Muscle, The Dodge Dart Story

Mighty Mopars (1960-1974)