Universal 1970 Information - Chicagoland Chapter GSCA
Universal 1970 Information
- Production Figures Body Style Hardtop Hardtop Hardtop Convertible Convertible GSX GSX Total Production for 1970
Engine Type 350 455 455 Stage 1 455 455 Stage 1 455 455 Stage 1
Production 9,948 5,589 2,465 1,184 232 278 400 20,096
- VIN
? Located on the upper left face of the dash and is visible through the windshield. ? The 1st digit will be a 4, Buick's code.
? The next 2 digits will be -
34 for GS 350
46 for GS 455
? The next 2 digits are the body style code -
67 for two door convertible
37 for two door hardtop ? The 6th digit is the year code, 0.
? The letter is the assembly plant code -
B - Baltimore, Maryland
C - South Gate, California
D - Atlanta, Georgia
G - Framingham, Massachusetts
H - Flint, Michigan
I - Oshawa, Canada
K - Kansas City or Leeds, Missouri
L - Van Nuys, California
N - Norwood, Ohio
V - Bloomfield, New Jersey
X - Kansas City, Missouri or Fairfax, Kansas
Y - Wilmington, Delaware
Z - Fremont, California
- Colors
Color
Sales Code
Service Code
Regal Black
A
19
Glacier White
C
10
Gulfstream White
D
25
Diplomat Blue
E
28
Coronet Gold
G
55
Seamist Green
H
58
Aqua Mist
K
34
Sherwood Green
M
48
Burgundy Mist
N
78
Silver Mist
P
14
Fire Red
R
75
Desert Gold
S
53
Bamboo Cream
Y
50
Harvest Gold
Z
55
Apollo White
C
10
Saturn Yellow
Q
Q
- Vinyl Roof Colors Color White Black Dark Gold Dark Brown Dark Green
Sales Code 1 2 7 5 9
Service Code A
- Convertible Top Colors
Color
Sales Code
Service Code
White
1
Black
2
Dark Green
5
E
- Assorted Information
? 1970 Chevrolet Monte Carlo's and Chevelle's use the same trunk lids as the GS.
? You could order the GS painted in a Riveria color for $100. The Riveria paint code will
be on the cowl plate.
1970 GS 350
- Engine
? Engine has an engine code of SP and is painted red. ? Bore and Stroke - 3.800" x 3.850" ? Compression Ratio - 10.25:1 ? Horsepower - 315 hp @ 4800 RPM ? Torque - 410 ft. lbs. @ 3200 RPM ? The Carburerator was a Rochester Q Jet 4V with numbers of M/T 7040245 and A/T
7040244
? Distributor Number - 1112006 ? Firing Order is 1-8-4-3-6-5-7-2 with the left bank from front to back being 1-3-5-7 and the
right being 2-4-6-8. - Transmission
? There were three different transmissions offered with the GS in 1970, a three speed manual, a four speed manual, and the TH-350 automatic.
- Rear Axle
? The standard rear axle ratio was 3.23:1. - Assorted Information
? The GS was equipped with dual exhaust. ? The stripes in the rocker panels should be red in color.
1970 GS 455
- Engine
? Engine has an engine code of SR and is painted red. ? Bore and Stroke - 4.3125" x 3.900" ? Compression Ratio - 10.00:1 ? Horsepower - 350 hp @ 4600 RPM ? Torque - 510 ft. lbs. @ 2600 RPM ? The Carburerator was a Rochester Q Jet 4V with numbers of M/T 7040243 and A/T
7040246
? Distributor Number - 1111984 ? Firing Order is 1-8-4-3-6-5-7-2 with the left bank from front to back being 1-3-5-7 and the
right being 2-4-6-8.
? The intake casting number was 1236403. ? The head casting number was 1231786. ? Note: The casting number for service replacement heads was 1240149. ? The valves were 2.000" in diameter for intake and 1.625" in diameter for exhaust. ? The block casting number was 1231738. - Transmission
? There were three different transmissions offered with the GS in 1970, a three speed manual, a four speed manual, and the TH-400 automatic.
- Rear Axle
? The standard rear axle ratio was 3.42:1 for manual transmission cars and 2.93:1 for cars equipped with the TH-400.
- Assorted Information
? The GS was equipped with dual exhaust. ? The stripes in the rocker panels should be red in color.
1970 GS 455 Stage 1
- Engine
? Engine has an engine code of SS, located between the 5 and 7 plug holes, and is painted red.
? Bore and Stroke - 4.3125" x 3.900" ? Compression Ratio - 10.50:1 ? Horsepower - 360 hp @ 4600 RPM ? Torque - 510 ft. lbs. @ 2600 RPM ? The Carburerator was a Rochester Q Jet 4V with numbers of M/T 7040246 and A/T
7040246
? Distributor Number - 1111962 ? Firing Order is 1-8-4-3-6-5-7-2 with the left bank from front to back being 1-3-5-7 and the
right being 2-4-6-8.
? The intake casting number was 1231718. ? The head casting number was 1231786. ? Note: The casting number for service replacement heads was 1240149. ? The Stage 1 heads share casting numbers with the 455 heads, but contain larger valves.
The intake valve is 2.120" in diameter and the 1.755" in diameter.
? The block casting number was 1231738. ? Stage 1 cam -
o At advanced duration (0.006") is 297o intake and 307o exhaust. Duration at 0.050" is 207o intake and 226o exhaust.
o Lift at intake is 0.406" and 0.440" at exhaust o Lobe seperation is 116o at intake and exhaust. ? The Stage 1 should have a 5/8" inside diameter oil pickup tube and a high pressure 60 psi oil relief spring.
? The Stage 1 should also have chrome valve covers and bolts. ? The Stage 1 had a black painted air cleaner lid. - Transmission
? There were three different transmissions offered with the GS in 1970, a three speed manual, a four speed manual, and the TH-400 automatic.
? If the car has the TH-400 the transmission should have a model code of BB. ? The transmission model code is located on the passenger side of the transmission. ? TH-400 should also have a high RPM governor. - Rear Axle
? The standard rear axle ratio was 3.64:1 for non-air conditioned cars and 3.42:1 for cars equipped with air conditioning.
- Assorted Information
? The GS was equipped with dual exhaust. ? The stripes in the rocker panels should be red in color. ? All GS Stage 1's were assembled in Flint, Michigan and will have H as the seventh
position of the VIN.
? The Stage 1 package was code #275 and cost $199.05. ? The Stage 1 emblems should attach through studs in the "S" and the "1".
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