General Engine Specifications for GM H-Body Cars

 

Year

Engine Displacement

(cu. in.)

Carburetor Type

Horsepower @ rpm

Torque @ rpm

(ft. lbs.)

Bore X Stroke

(in.)

Compression Ratio

Oil Pressure (psi)

1971

4-140

1 bbl

90@4600

136@2400

3.50X3.625

8.0:1

40

4-140

2 bbl

110@4800

138@3200

3.50X3.625

8.0:1

40

1972

4-140

1 bbl

80@4800

121@2800

3.50X3.625

8.0:1

40

4-140

2 bbl

90@4800

121@3200

3.50X3.625

8.0:1

40

1973

4-140

1 bbl

75@4400

115@2400

3.50X3.625

8.0:1

40

4-140

2 bbl

85@4400

122@2400

3.50X3.625

8.0:1

40

1974

4-140

1 bbl

75@4400

115@2400

3.50X3.625

8.0:1

40

4-140

2 bbl

85@4400

122@2400

3.50X3.625

8.0:1

40

1975

4-140

1 bbl

78@4200

120@2000

3.50X3.625

8.0:1

40

4-140

2 bbl

87@4400

122@2800

3.50X3.625

8.0:1

40

4-140 Calif.

2 bbl

80@4400

116@2800

3.50X3.625

8.0:1

40

6-231

2 bbl

110@4000

175@2000

3.800X3.400

8.0:1

27

8-262

2 bbl

110@3600

200@2000

3.671X3.100

8.5:1

32-40

8-350 Calif.

2 bbl

125@3600

235@2000

4.000X3.480

8.5:1

32-40

1976

4-1401

1 bbl

69@4000

113@2400

3.50X3.625

7.9:1

40

4-1402

1 bbl

70@4400

107@2400

3.50X3.625

8.0:1

27-41

4-1401

2 bbl

87@4400

122@2800

3.50X3.625

7.9:1

40

4-1402

2 bbl

84@4400

113@3200

3.50X3.625

8.0:1

27-41

6-2311

2 bbl

110@4000

175@2000

3.80X3.400

8.0:1

40

6-2313

2 bbl

105@3400

185@2000

3.80X3.400

8.0:1

37

8-262

2 bbl

110@3600

200@2000

3.671X3.100

8.5:1

32-40

8-305

2 bbl

140@3800

245@2000

3.736X3.480

8.5:1

32-40

1977

4-1401

2 bbl

87@4400

122@2800

3.50X3.625

7.9:1

40

4-1404

2 bbl

84@4400

117@2400

3.50X3.625

8.0:1

27-41

4-151

2 bbl

87@4400

128@2400

4.000X3.000

8.3:1

36-41

6-231

2 bbl

105@3200

185@2000

3.800X3.400

8.0:1

36-41

8-305

2 bbl

145@3800

245@2400

3.736X3.480

8.5:1

32-40

8-305 Calif.

2 bbl

135@3800

240@2000

3.736X3.480

8.5:1

32-40

1978

4-1515

2 bbl

85@4400

123@2800

4.000X3.000

8.3:1

36-41

4-1516

2 bbl

87@4400

128@2400

4.000X3.000

8.3:1

36-41

4-1517

2 bbl

90@4400

130@2400

4.000X3.000

8.3:1

40

6-196

2 bbl

90@3600

165@2000

3.500X3.400

8.0:1

37

6-231

2 bbl

105@3400

185@2000

3.800X3.400

8.0:1

37

8-305

2 bbl

145@3800

245@2400

3.736X3.480

8.4:1

32-70

1979

4-1518

2 bbl

85@4400

123@2800

4.000X3.000

8.3:1

36-41

4-1519

2 bbl

90@4400

128@2400

4.000X3.000

8.3:1

36-41

6-196

2 bbl

105@4000

160@2000

3.500X3.400

8.0:1

37

6-231

2 bbl

115@3600

190@2000

3.800X3.400

8.0:1

37

8-305

2 bbl

130@3200

245@2400

3.736X3.480

8.4:1

45

1980

4-151

2 bbl

90@440010

128@240011

4.000X3.000

8.2:1

37-41

6-231

2 bbl

110@3800

190@1600

3.800X3.400

8.0:1

37

1-     Astre, Sunbird

2-     Vega, Monza

3-     Skyhawk, Starfire

4-     Starfire, Monza

5-     Monza

6-     Sunbird

7-     Starfire

8-     All exc. Calif. - Starfire

9-     All exc. Calif. - Monza, Sunbird

10- Calif. - 85@4400

11- Calif. - 123@2800

 

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