NHRA Horsepower Ratings for the 273

273 Engines

273/180 HP
180 HP @ 4200 RPM

273/235 HP
235 HP @ 5200 RPM

273/275 HP ( Dart)
275 HP @ 6000 RPM

Our stock 1967 273/235 HP Barracuda Fastback, 4-Speed, w/3.23 Posi ran a best
of 16.16 in 1967 classed in F/Stock = (12.50 - 13.99 Wt/Hp)

In 1968, was classed in J/Stock = (12.50-12.99 Wt/Hp)
Hooker Fenderwell Headers, 4.56 Gears, Hurst Shifter, Sun Tachometer,
Stewart-Warner Electric Fuel Pump, Distributor Modification.
Suspension Traction Pinion-Snubber, and 7" Wide-Slicks.

(With no modifications done to the engine)

14.70's @ 96 MPH