How do I identify a 428 engine?
How do I identify a 428 engine?
On 1968–69 428 blocks you will find “428” stamped between the freeze plugs. On blocks produced in 1970 and after, you will find 350, 400, or 455 stamped towards the left side of the front of the block.
What was the difference between a 1967 and a 1968 Pontiac Firebird?
The styling difference from the 1967 to the 1968 model was the addition of federally-mandated side marker lights: for the front of the car, the turn signals were made larger and extended to wrap around the front edges of the car, and on the rear, the Pontiac (V-shaped) Arrowhead logo was added to each side.
What was the horsepower of a 1974 Pontiac Firebird?
The 1974 model year production literature listed the specifications of the production engine (290 SAE net horsepower). In 1973 and 1974, a special version of the 455, called the Super Duty 455 (SD-455), was offered.
When did the second generation Pontiac Firebird come out?
Second generation (1970–1981) The second generation debut for the 1970 model year was delayed until February 26, 1970, because of tooling and engineering problems; thus, its popular designation as a 1970½ model, while leftover 1969s were listed in early Pontiac literature without a model-year identification.
What kind of crankshaft did the Pontiac Firebird use?
The SD-455 consisted of a strengthened cylinder block that included four-bolt main bearings and added material in various locations for improved strength. Original plans called for a forged crankshaft, although actual production SD455s received nodular iron crankshafts with minor enhancements.
What was the horsepower of a Pontiac Firebird in 1968?
For 1968, the same basic 400 remained, now rated at 330hp at 4,800 RPM and 430-lbs.ft. of torque at 3,300 RPM, and equipped with “16” cylinder heads; “62” heads were used on some automatic cars. Pontiac also added the L74 400 H.O. engine, using the “067” cam on automatics and the 288/302-duration “068” on manuals, both rated at 335hp.
When did Pontiac stop making the Firebird 400?
The 400 V-8 and the Firebird 400 package did continue into 1969, but the Firebird itself changed substantially enough that year to warrant its own separate consideration. So if you’re considering buying a 1967-1968 Firebird 400, here’s what you should look for.
What was the horsepower of a Firebird ram air?
The same combination in the GTO Ram Air was worth 360hp, but the altered throttle linkage from the W66 kept the Firebird Ram Air engine from its full potential. The Ram Air package returned in 1968; now equipped with “31” heads and an “068” cam, it was still rated at 335hp.
What was the gear ratio on a 1967 Firebird 400?
DIFFERENTIAL The 1967 Firebird 400 could have come with any of the Firebird’s range of rear gear ratios in the B-O-P 10-bolt differential, from a 2.56 through a 3.90. Firebird 400 buyers who ordered a 3.90:1 gear ratio–which was required with the Ram Air version–could only get that ratio with a Saf-T-Track limited-slip differential.
