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ACW · 03-10-2005, 10:48 AM

GM special packages: early engine-focused

Firebird 326 (1967-1969) (Firebird 326 was Pontiac's standard model equipped with a 2 barrel 326 cid V8, rated @ 250 bhp & manual 3 speed "on the tree" transmission; replaced by the Pontiac L-30 350 rated 265 bhp in '68.)
Firebird HO (1967-1969) (Firebird HO was the high-output version of the 326 V8. It was rated @ 285 bhp, equipped with a Quadrajet, dual exhausts, heavy duty suspension and special 'H-O' body striping; replaced by the Pontiac L-76 350 HO rated 320 bhp in '68.)
Firebird 400 (1967-1968) (Firebird 400 was Firebird's 'king of the hill' for '67 with the 400 cid rate of 325 bhp in both Base & Ram Air versions. Throttle restrictors prevented the '67 Firebird Ram Air 4 barrel secondaries from fully opening @ Wide Open Throttle. Tuners such as Royal Pontiac were able to quickly rectify the handicap. This tuning matched the performance of the exact same engine combination that was available in, the then 'top-dog' of Pontiac, the GTO Ram Air which was rated 360 bhp in '67. 1968 saw the choices expand to four 400 cid engines for the Firebird.)
Formula SD-455 and Trans Am SD-455 (1973-1974) (In 1973, Pontiac released a limited production engine known as the Super Duty 455 (SD 455). The engine was optional in '73 and '74 on both Formulas and Trans Ams. The SD-455 was a race bred engine that featured a special heavy duty block, forged pistons, four bolt main caps, a provision for dry sump oiling, round port heads that were reported to flow better than Chryslers' Famed Hemi, "header" style exhaust manifolds, and an 800 cfm carb. Original SD-455 cars are valuable collectibles today. Production: 1973: 43 Formulas, 252 Trans Ams; 1974: 58 Formulas, 943 Trans Ams. In addition there were some SD-455 crate motors sold through dealers as factory 'Service Replacement' engines.)

03-10-2005, 10:48 AM	#3
ACW TECH Junkie Trader Rating: 0 Join Date: Dec 2004 Location: Beaumont, TX Posts: 3,983	GM special packages: early engine-focused Firebird 326 (1967-1969) (Firebird 326 was Pontiac's standard model equipped with a 2 barrel 326 cid V8, rated @ 250 bhp & manual 3 speed "on the tree" transmission; replaced by the Pontiac L-30 350 rated 265 bhp in '68.) Firebird HO (1967-1969) (Firebird HO was the high-output version of the 326 V8. It was rated @ 285 bhp, equipped with a Quadrajet, dual exhausts, heavy duty suspension and special 'H-O' body striping; replaced by the Pontiac L-76 350 HO rated 320 bhp in '68.) Firebird 400 (1967-1968) (Firebird 400 was Firebird's 'king of the hill' for '67 with the 400 cid rate of 325 bhp in both Base & Ram Air versions. Throttle restrictors prevented the '67 Firebird Ram Air 4 barrel secondaries from fully opening @ Wide Open Throttle. Tuners such as Royal Pontiac were able to quickly rectify the handicap. This tuning matched the performance of the exact same engine combination that was available in, the then 'top-dog' of Pontiac, the GTO Ram Air which was rated 360 bhp in '67. 1968 saw the choices expand to four 400 cid engines for the Firebird.) Formula SD-455 and Trans Am SD-455 (1973-1974) (In 1973, Pontiac released a limited production engine known as the Super Duty 455 (SD 455). The engine was optional in '73 and '74 on both Formulas and Trans Ams. The SD-455 was a race bred engine that featured a special heavy duty block, forged pistons, four bolt main caps, a provision for dry sump oiling, round port heads that were reported to flow better than Chryslers' Famed Hemi, "header" style exhaust manifolds, and an 800 cfm carb. Original SD-455 cars are valuable collectibles today. Production: 1973: 43 Formulas, 252 Trans Ams; 1974: 58 Formulas, 943 Trans Ams. In addition there were some SD-455 crate motors sold through dealers as factory 'Service Replacement' engines.)