http://www.seriousviewers.com/D-Dart/ddart.htm
The 273 v8 was rated at 275hp and weighing in at just over 2900 lbs. The car qualified for NHRA's D/Stock category.

Dodge's normally aspired high performance 273 was rated at 235hp. The extra 40hp the D/Dart produced was basic hotrodding. Off the speedshop shelf bolt on's included Racer Brown valve springs, a Camcraft 284-degree .500" lift cam, Doug's Headers, and a Holley 4160 bolted to the stock intake. All were equipped with the A-833 4 Speed and a Hurst shifter, Weber clutch components, and an 8 3/4 Suregrip with 4.86 gears. Unavailable for this car were air conditioning and a warranty. There were no external badging or markings to note the D/Dart package over a regular Dart GT.

http://www.supercars.net/cars/435.html