• Major changes for 1974 involved the following:
  • a restyled, sloping rear end
    • elimination of the conventional rear bumper and replaced by a body-color urethane bumper
    • The new rear end eliminated the last vestiges of the long-lived rear-deck-lid spoiler and replaced it with a smooth-surfaced rear deck and a body-colored resilient urethane extension covering the actual rear bumper and including the circular taillights
    • The new rear end met federal energy-absorbing standards
    • It added 30 pounds to the weight of the Corvette
    • The rear cap section was of a two-piece design for 1974, but was chaged to a one-piece design with a pair of fake bumperettes molded in for 1975
    • The increased weight of the rear end cap necessitated minor suspension changes such as revised front and rear sprig rates.
  • A new optional "Gymkhana" suspension featured
    • a 0.9375-inch (23.8 mm) diameter front stabilizer bar
    • heavier-duty front suspension bushings
    • front springs with a 550 lb/in rating
    • rear springs with a 304 lb/in rating
  • The poer steering, seat belts, and radiator were improved.
  • The alarm system activator was relocated
  • Ten exterior colors were available
    • Bright Yellow
    • Classic White
    • Corvette Gray
    • Corvette Medium Blue
    • Corvette Orange
    • Dark Brown
    • Dark Green
    • Medium Red
    • Mille Miglia Red
    • Silver Mist
  • All convertibles came with a choice of Black or White soft tops
  • Interior colors were
    • Black
    • Dark Blue
    • Dark Red
    • Neutral
    • Saddle
    • Silver

I.D. NUMBERS

• The serial number [Vehicle Identification Number -- VIN] was stamped on a plate on the inner vertical surface of the left windshield pillar visible through the windshield.
• Convertible Serial numbers ranged from 1Z67*4S400001 to 1Z67*4S437502
• Coupe Serial numbers ranged from 1Z67*4S400001 to 1Z67*4S437502

  Position	Character	Description
  1	1	Chevrolet Division
  2	Z	Corvette
  3 & 4	67	convertible
  	37	coupe
  5	*	Engine type where * is replaced by the following J = ZQ3 350-cid V8, 195-hp, 4-barrel T = L82 350-cid V8, 250-hp, 4-barrel Z = LS4 454-cid V8, 270-hp, 4-barrel
  6	4	1974
  7	S	Assembled in St. Louis, MO
  8 to 13	400001 to 437502	production sequence

• Engine serial number

  1 to 7	0001001	sequential production number
  8	F or T	Flint, MI or Tonawanda, NY
  9 to 11	Carburetion & transmission	Code	Engine	Compression	transmission	Carburetor
  		CKZ	350-cid 195-hp V-8	9.0:1	manual	four-barrel
  		CLB	350-cid 195-hp V-8	9.0:1	4-speed manual with NB2	four-barrel
  		CLA	350-cid 195-hp V-8	9.0:1	THM-400 automatic	four-barrel
  		CLC	350-cid 195-hp V-8	9.0:1	THM-400 automatic with NB2	four-barrel
  		CLR	350-cid 250-hp V-8	9.0:1	4-speed manual	four-barrel
  		CWM	454-cid 270-hp V-8	8.25:1	4-speed manual	four-barrel
  		CWR	454-cid 270-hp V-8	8.25:1	THM-400 automatic	four-barrel
  		CWS	454-cid 270-hp V-8	8.25:1	THM-400 automatic with NB2	four-barrel

• Corvette engines have the last six digits of the VIN stamped on the block next to the engine number
• The body number plate was located on the engine side of the cowl.
• The Fisher Body Style Number 74-1YZ67 identifies a Corvette Stingray convertible
• The Fisher Body Style Number 74-1YZ37 identifies a Corvette Stingray coupe
• The body number is the production serial number of the body.
• The trim number indicates the interior trim color and material.
• The ten 1974 Corvette exterior colors were:
  • 946 = Bright Yellow
  • 910 = Classic White
  • 917 = Corvette Gray
  • 922 = Corvette Medium Blue
  • 980 = Corvette Orange
  • 948 = Dark Green
  • 968 = Dark Brown
  • 974 = Medium Red
  • 976 = Mille Miglia Red
  • 914 = Silver Mist
• Upholstery Codes

  Color	Vinyl Upholstery	Leather Upholstery
  Black	400	404
  Silver	406	407
  Neutral	408
  Dark Blue	413
  Saddle	415	416
  Dark Red	425

Series No.	Body/Style No.	Body Type	Factory Price	Shipping Weight	Production Total
Z	37	2-dr. Sport Coupe - 2 passenger	$6002	3532	32,028
Z	67	2-dr. Conv - 2 passenger	$5766	3532	5,474

TRANSMISSION

• Standard Manual Transmission: close-ratio four-speed manual all-synchromesh transmission with floor-mounted gear shifter
• Automatic Transmission: Three-speed Turbo Hydra-Matic automatic transmission with floor-mounted gear shifter (optional)

CHASSIS

Feature	Convertible	Coupe
Wheelbase	98 inches (2.489 m)	98 inches (2.489 m)
Overall length	185.5 inches (4.712 m)	185.5 inches (4.712 m)
Overall width	69.0 inches (1.753 m)	69.0 inches (1.753 m)
Overall height		47.4 inches (1.204 m)
Ground Clearance	4.5 inches (11.4 cm)	4.5 inches (11.4 cm)
Front tread	58.7 inches (1.491 m)	58.7 inches (1.491 m)
Rear tread	59.4 inches (1.509 m)	59.4 inches (1.509 m)
Tires	F70-15	F70-15
Frame	Full-length welded-steel ladder type with five cross members. Steel box sections, welded.
Front suspension	Independent, unequal-length A-arms, coil springs; tubular shocks and stabilizer bar
Rear suspension	Independent, trailing arms, toe links, transverse chromium-carbon steel leaf spring, tube shocks, and anti-roll bar
Steering	Saginaw recirulating ball, 17.6:1 ratio, 2.9 turns to lock, 39.0 turning circle
Rear axle type	Sprung differential, Hypoid gear
Brakes	Hydraulic, vented four wheel discs; 11.75-inch diameter, single calipers, optional power assist
Swept area	11.75" front and back
Total swept area	461 sq. in.
Wheels	8" wide slotted steel 15" 5-lug disc
Standard rear axle ratio	3.36:1
Optional rear axle ratio	3.70:1, 3.08:1, 3.36:1, 3.55:1, 4.11:1

OPTIONS

RPO Custom interior trim ($154) RPO A31 Electric power windows ($86) RPO A85 Custom shoulder belts ($41) RPO C07 Auxiliary hardtop for convertible ($267) RPO C08 Vinyl cover for auxiliary hardtop ($329) RPO C50 Rear window defroster ($43) RPO C60 Air conditioning ($467) RPO FE7G81 Gymkhana suspension ($7) RPO G81 Positraction rear axle, all ratios ($12) RPO J50 Power brakes ($49) RPO L82 350-cid 250-hp V-8 ($299) RPO LS4 454-cid 270-hp V-8 ($250) RPO M21 Four-speed close-ratio manual transmission (n/c) RPO M40 Turbo Hydra-Matic automatic transmission (n/c) RPO N37 Tilt-telescopic steering wheel ($82) RPO N40 Power steering ($117) RPO QRM White stripe nylon steel-belted radial tires GR70 x 15 ($32) RPO QRZ GR70 x 15 raised-white-letter steel-belted radial tires ($45) RPO U05 Dual horns ($4) RPO U58 AM-FM radio ($276) RPO U69 AM-FM radio ($173) RPO UA1 Heavy-duty battery ($15) RPO UF1 Map light ($5) RPO Z07 Off-road suspension and brake package ($369) HISTORICAL NOTES 95.6% had power steering (up from 91.5% last year) 88.3% had power brakes (up from 79.3% last year) 63.1% had power windows (up from 46% last year) 77.7% had air conditioning (up from 70.8% last year) 33.7% had four-speed manual transmissions (down from 41.2% last year)

1974 CORVETTE

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