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1973–1975 L65 400 cu in (6.6 L) V8 with 2-barrel carburetor (standard engine, others were optional) 1973–1975 L78 400 cu in (6.6 L) V8 with 4-barrel carburetor; 1973–1975 L75 455 cu in (7.5 L) V8 with 4-barrel carburetor; Notes: A SD-455 equipped engineering prototype Grand Am was built and tested, [4] but was later dismantled and destroyed.
The SD-455 motor was listed as an option in dealer brochures for the 1973 Grand Am and LeMans GTO(and planned for the Grand Prix as well) although none were produced for sale. Nevertheless, there appears in the October 72 issue of MOTOR TREND, a road test of a 1973 SD-455 Grand Am. 1975 Factory Service Manual lists the SD-455, but the SD-455 ...
The "all hand-assembled" LS2 SD455 engine was rated at 290 hp (216 kW) at 4000 rpm and 395 lb⋅ft (536 N⋅m) at 3600 rpm. All Pontiac engines included a new EGR system, which delayed the SD-455 program until late into the production year. The shaker decal on the scoop read "SD-455". The 1973 Trans Am introduced "Radial Tuned Suspension".
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 ...
Also announced for the '73 GTO and Grand Am was the Super Duty 455 V8, which was rated at 310 hp (230 kW). Cars magazine tested an SD-455-equipped 1973 Pontiac GTO and chose it as Car Of The Year, yet that engine never made it to production in a GTO or other Pontiac A-body, but would be limited to the Firebird Formula and Trans Am.
1977 Pontiac Can Am. The Pontiac Can Am is a midsize muscle car built by Pontiac and based on the Pontiac LeMans and the Pontiac Grand Am. The Can Am was a special edition option package and was only available in 1977. It was named for the Can Am racing series, continuing the race theme used for the Pontiac Grand Prix, LeMans and Trans Am.
The Grand Prix is a line of automobiles produced by the Pontiac Division of General Motors from 1962 until 2002 as coupes and from 1989 through 2008 model years as four-door sedans. First introduced as a full-size performance coupe for the 1962 model year, the model repeatedly varied in size, luxury, and performance over successive generations.
The Pontiac Ventura is an automobile model which was produced by Pontiac between 1960 and 1977. The Ventura started out as a higher content trim package on the Pontiac Catalina, and served as the inspiration for the luxury content Pontiac Grand Prix in 1962, then remained as a trim package on the Catalina until 1970.