Rear spring rates

This is a list of linear rate springs that were installed in 73-77 A-body cars. They were used in all makes and models. Part numbers and specifications are from NAPA.

The part number 2772094 is specific to station wagons across all years and makes.
Part numbers 2772047 and 2773197 are specific to El Camino with 2772047 specific to 1974.

2771889 # Coil Spring Coils : 6.84 Coil Spring Free Height : 17.53"
Coil Spring I.D. : 5.57" Spring Rate : 124
Wire Diameter : .593"

2772046 # Coil Spring Coils : 6.37 Coil Spring Free Height : 14.6"
Coil Spring I.D. : 5.57" Spring Rate : 170
Wire Diameter : .61"

2772047 # Coil Spring Coils : 5.57 Coil Spring Free Height : 14.4"
Coil Spring I.D. : 5.57" Spring Rate : 141
Wire Diameter : .565"

2772052 # Coil Spring Coils : 6.13 Coil Spring Free Height : 15.8"
Coil Spring I.D. : 5.562" Spring Rate : 123
Wire Diameter : .558"

2772094 # Coil Spring Coils : 6.64 Coil Spring Free Height : 14.34"
Coil Spring I.D. : 5.53" Spring Rate : 198
Wire Diameter : .656"

2773007 # Coil Spring Coils : 6.13 Coil Spring Free Height : 16.76"
Coil Spring I.D. : 5.57" Spring Rate : 126
Wire Diameter : .554"

2773105 # Coil Spring Coils : 6.49 Coil Spring Free Height : 15.82"
Coil Spring I.D. : 5.57" Spring Rate : 137
Wire Diameter : .593"

2773193 # Coil Spring Coils : 6.37 Coil Spring Free Height : 15.42"
Coil Spring I.D. : 5.57" Spring Rate : 157
Wire Diameter : .61"

2773195 # Coil Spring Coils : 6.29 Coil Spring Free Height : 15.4"
Coil Spring I.D. : 5.57" Spring Rate : 142
Wire Diameter : .59"

2773196 # Coil Spring Coils : 6.5 Coil Spring Free Height : 15.52"
Coil Spring I.D. : 5.54" Spring Rate : 167
Wire Diameter : .609

2773197 # Coil Spring Coils : 5.28 Coil Spring Free Height : 14.12"
Coil Spring I.D. : 5.53" Spring Rate : 166
Wire Diameter : .58"

2773262 # Coil Spring Coils : 6.31 Coil Spring Free Height : 15.72"
Coil Spring I.D. : 5.57" Spring Rate : 141 Wire Diameter : .59"

I will post up what models had what p/n's in future posts.

1973 Chevelle used these p/n's

coupe/sedan = 2773195 heavy duty p/n = 2772046
Station wagon = 2772094 heavy duty p/n = 2773262

1974

coupe/sedan = 2773105 heavy duty not listed

1975/76/77

coupe/sedan = 2773007 heavy duty p/n = 2773193

Monte Carlo used these

1973 Small block equipped = 2773105 heavy duty = 2772046
Big block equipped = 2773007 heavy duty = 2773262

1974 = 2773105 heavy duty = 2772046

1975/76/77 = 2773007 heavy duty = 2773193

Buick Century/Regal

1973/74
2-door = 2773105 heavy duty = 2772046
4-door = 2773007 heavy duty = 2773193

1975/76
Station Wagon = 2773196
2-door/4-door = 2773007 heavy duty = 2773193

1977 = 2773007 heavy duty = 2771889

Oldsmobile Cutlass

1973-76
2773007 (1973 455 H/O)
2773105 (1973 455 base)
2772046 (heavy duty)
2773193 (heavy duty)

1977
2773007 (4-door)
2773105 (2-door)
2773195 (heavy duty)
2773196 (station wagon, 2772094 is H/D station wagon)
2773262 (V-6 heavy duty)

Pontiac

2772046 heavy duty (73, 74,75 all models,& 77 GP)
2772052 1974 Lemans
2773007 1973 non h/d, 1976 all models
2773105 1973 455, 1974/75 all models, 77 GP and Lemans
2773193 heavy duty (73, 76 GP & Lemans/Grand Lemans)
2773195 heavy duty(74 Lemans, 77 Lemans)
2773262 77 Lemans