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The 1974 models featured a redesigned "shovel-nose" front end and new wide "slotted" taillights. The 400, 455, and SD-455 engines were offered in the Trans Am and Formula models during 1974. A June 1974 test of a newly delivered, privately owned SD-455 Trans Am appeared in Super Stock and Drag Illustrated. With an unmodified car and a test ...
The 1973 Trans Am engine displaced 455 cubic inches in the base L75 and the Super Duty LS2 option. The base 455 produced 40 fewer horsepower than the round port Super Duty 455. Horsepower for the base L75 455 was rated at 250 hp (186 kW) at 4000 rpm and 370 lb⋅ft (502 N⋅m) at 2800 rpm.
However, in the June 1974 issue of SUPER STOCK AND DRAG ILLUSTRATED, a new 1974 Trans Am with the SD-455 motor ran 14.25 at 101 mph (163 km/h). This was a completely stock car on loan from a private owner for the test. Furthermore, this car had an automatic, air conditioning, a 3.08 axle and weighed 4,010 pounds (1,819 kg).
One holdout to this industry-wide slide was the Super Duty 455 engine of 1973–1974. Available only in the Firebird Formula and Trans Am models, this was rated at 310 hp (230 kW) net initially but after having issues passing EPA emissions tests, the camshaft was changed to the old RA III cam, and with the change, came a 290 hp (220 kW) net rating.
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Omnicom is buying Interpublic Group in a stock-for-stock deal that will create the largest ad agency in the world with combined annual revenue of almost $26 billion. The names may be unfamiliar to ...
Planned and listed as an option for the 1973 GTO but never materialized was a 455 Super Duty V8 rated at 310 hp (231 kW) for which introduction was delayed by Pontiac management due to emission issues until the spring of 1973 and then became available only in the smaller Firebird Formula and Trans Am pony cars.
The new K street. Ahead of Trump's return to the White House in January, a dozen leading lobbyists told BI that having a significant presence in Florida is now an essential part of doing business ...