1967 Corvette Drivetrain Identification

General Motors 2018

Author: Alan Colvin

In this issue of Chevy Classics, we are paying tribute to the 1967 Corvette, which celebrated its Silver Anniversary year in 1992.  The Bloomington Gold Silver Salute also celebrated the 1967 Corvette in 1992 and it was the last year of Bloomington Gold being held in Bloomington, Illinois.  In this article, we will reflect back on the past and we hope to conjure up some images from this very special year. 

 

In 1967, Chevrolet Motor Division made some drastic changes to make the model year be remembered for all time.  The Camaro model line was introduced along with the new 350 engine as a Camaro power plant.  Later in the year, a man named Vince Piggins wanted to go racing, so the Z/28 Camaro platform was built.  It was based on combining the old 283 crank and the 327 2 bolt block to create a winner right out of the gate.   And who could ever forget the big block Biscaynes and Impalas?  The 1967 Super Sport Impala with its unforgettable hood looks fast just sitting still in a parking lot.  It was a year in which it seemed "John Q. Public" decided to go to Chevrolet, order up raw horsepower with lots of torque on the side, and a large glass of water to make their asphalt dinners complete. 

 

General Motors 2018General Motors 2018
General Motors 2018

 

It was also a year when a man named Zora-Argus Duntov had an incredible dream.  He believed that it took more cubic inches and raw power than anyone else to make the Corvette a winner.  He was right! It was with these thoughts in mind that the L-88 was conceived and finally unveiled in 1967.

 

The 1967 model year was the last of the "mid-years" design with the 1967 the least adorned from the exterior. The hood script emblems and fender flags were removed and new functional fender vents with five angled slots were added to the body. The knock-off wheel was changed to a bolt-on design with a clip-on center cap to conceal the lug nuts.  Rally wheels now came as standard equipment. Also the interior was modified in that the seat design was changed and the parking brake was moved to between the bucket seats.

 

General Motors 2018General Motors 2018
General Motors 2018

 

Due to the fact that this was such a special year for the Corvette, we decided to give you a complete breakdown of all Corvette powertrains for the 1967 model year.  Thanks Chevrolet for a really great year.

 

1967 Standard Corvette
327/300 HP
Drivetrain Assembly Breakdown

Block
327/300 HP (2-bolt) #3892657

Engine Code Suffix
HE - Man. Trans., 4BC
HH - Man. Trans., 4BC w/AIR
HO - Powerglide, 4 BC
HR - Powerglide, 4 BC w/AIR

Cylinder Heads
1.94 Intake, 1.50 Exhaust, Cast Iron casting #3890462 (possible usage #3919291)

Crankshaft
Forged steel, casting # 2680

Rods
Drop-forged w/ 11/32" bolt

Intake Manifold
Cast Iron, closed plenum, casting #3872783

Carburetor
Holley Model 4160
List # R3810, Chevrolet #3906631 DA

Distributor
Stamping # 1111194 S/T, #1111117 A/T

Starter
Stamping # 1107320

Exhaust Manifolds
Casting # Left Hand #3846559 w/o AIR, #3872765 w/AIR
Right Hand #3747042 w/o AIR, #3872778 w/AIR

Bellhousing
#3840383 Aluminum

Transmission
Saginaw 3-speed,Muncie 4-speed(2.52),Powerglide

Rearend
Corvette IRS, 3.08 -3.36:1 gear ratios

 

1967 L-79 Corvette
327/350 HP
Drivetrain Assembly Breakdown

Block
327/350 HP (2-bolt) #3892657

Engine Code Suffix
HD - 4-speed, Hi-Lift Cam, 4BC w/AIR
HP - 4-speed, Hi-Lift Cam, Air Cond., P/S, 4 BC
HT - 4-speed, Hi-Lift Cam, 4BC
KH - 4-speed, Hi-lift Cam, Air Cond., P/S, 4 BC w/AIR

Cylinder Heads
2.02 Intake, 1.60 Exhaust, Cast Iron casting #3890462
(possible usage # 3919291)

Crankshaft
Steel Forged, casting #2680

Rods
Drop forged steel, 11/32" bolts

Intake Manifold
Aluminum high rise, closed plenum, casting # 3890490

Carburetor
Holley Model R-4160
List # R3810, Chevrolet #3906631 DA

Distributor
Stamping # 1111196, #1111157 Transistor ignition

Starter
Stamping # 1107320

Exhaust Manifolds
Casting # Left Hand #3846559 w/o AIR, #3872765 w/AIR
Right Hand #3747042 w/o AIR, #3872778 w/AIR
Bellhousing #3840383, Aluminum

Transmission
Muncie 4-speed only, 2.52 or 2.20 low gear

Rearend
Corvette IRS, 3.36 - 4.11:1 gear ratios

 

1967 L-36 Corvette
427/390 HP
Drivetrain Assembly Breakdown

Block
427/390 HP (2-bolt) #3904351 *

Engine Code Suffix
IL -4 speed, hyd. lifters, spec. cam., 4 BC
IM -4 speed, hyd. lifters, spec. cam., 4 BC, w/AIR
IQ -Powerglide, hyd. lifters, spec. cam., 4 BC
IR -Powerglide, hyd. lifters, spec. cam., 4 BC, w/AIR

Cylinder Heads
2.07 Intake, 1.72 Exhaust, Cast iron casting #3904390 (Early) #3909802 (Late)

Crankshaft
Forged steel,casting #6223

Rods
Standard rod, 3/8" bolt with knurled shank

Intake Manifold
Cast iron high rise,closed plenum, casting # 3669488

Carburetor
Holley Model 4160 List # R3815, Chevrolet #3906637

Distributor
Stamping # 1111247,# 1111248 Transistor ignition

Starter
Stamping # 1107365

Exhaust Manifolds
Casting # Left Hand #3880827
Right Hand #3880828

Bellhousing
#3899621,Aluminum

Transmission
Muncie 4-speed(2.52 or 2.20),Powerglide

Rearend
Corvette IRS,3.08-3.70:1 gear ratios

 

1967 L-68 Corvette
427/400 HP
Drivetrain Assembly Breakdown

Block
427/400 HP (2-bolt) #3904351 *

Engine Code Suffix
JC - 4 speed, L36 engine w/3x2BC
JD - Powerglide, L36 engine w/3x2BC
JF - 4-speed, L36 engine w/3x2BC w/AIR
JG - Powerglide, L36 engine w/3x2BC w/AIR

Cylinder Heads
2.07 Intake, 1.72 Exhaust, Cast iron casting #3904390 (Early) #3909802 (Late)

Crankshaft
Forged steel,Casting # 6223

Rods
Standard rod, 3/8" bolt with knurled shank

Intake Manifold
Aluminum high rise,3x2 plenum, casting # 3894382

Carburetor
Holley Model 2300
List # R3659, Chevrolet #3902353 EU ,(2) All Cars

Holley Model 2300C
List # 3660, Chevrolet #3902355 EV, S/T,(1)
List # 3888, Chevrolet #3909872 EM, A/T,(1)

Distributor
Stamping # 1111247, #1111248 W/Transistor ignition

Starter
Stamping # 1107365

Exhaust Manifolds
Casting # Left Hand #3880827
Right Hand #3880828

Transmission
Muncie 4-speed (2.52 or 2.20), Powerglide

Rearend
Corvette IRS, 3.08 - 3.70 gear ratios

 

1967 L-88 Corvette
427/430 HP
Drivetrain Assembly Breakdown

Block
427/430 HP (4-bolt) #3904351 *

Engine Code Suffix
IT - M-22 4 speed, 4BC, Special High Performance

Cylinder Heads
2.19 Intake, 1.84 Exhaust, Aluminum casting #3904392

Crankshaft
Forged, tuffrided, cross-drilled, casting # varied

Rods
Hi-performance dimple rod, 3/8" bolt with knurled shank

Intake Manifold
Aluminum high rise, open plenum, casting # 3885069

Carburetor
Holley Model 4150
List # R3418, Chevrolet #3886091

Distributor
Stamping # 1111240 Transistor ignition

Starter
Stamping # 1107352

Alternator
Stamping # 1100696 Transistor Ignition

Exhaust Manifolds
Casting # Left Hand #3880827
Right Hand #3880828

Transmission
Muncie M-22 4-speed

Rearend
Corvette IRS 3:08 positraction w/M-22

 

1967 L-71/L-89 Corvette
427/435 HP
Drivetrain Assembly Breakdown

Block
427/435 HP (4-bolt) #3904351 *

Engine Code Suffix
IU - 4-speed, 3x2BC, L71 engine w/alum. heads
JA - 4-speed, mech. lifters, 3x2BC w/AIR
JE - 4-speed, mech lifters, 3x2BC
JH - 4-speed, 3x2BC, L71 engine w/alum. heads w/AIR

Cylinder Heads
2.19 Intake, 1.72 Exhaust, Cast Iron (L-71) casting #3904391
Aluminum (L-89) casting #3904392
Note: The #3919840 cylinder head was possibly installed in some very late 1967 cars. This has been verified by #3919840 heads where the temperature sending unit boss is present, but not drilled and tapped.

Crankshaft
Forged, tuffrided, cross-drilled, casting # varied

Rods
Hi-performance dimple rod, 3/8" bolt with knurled shank

Intake Manifold
Aluminum high rise, 3x2 plenum, casting # 3894394

Carburetor
Holley Model 2300
List # R3659, Chevrolet #3902353 EU ,(2) All Cars
Holley Model 2300C
List # 3660, Chevrolet #3902355 EV, S/T,(1) All Cars

Distributor
Stamping # 1111258 Transistor ignition

Starter
Stamping # 1107365

Exhaust Manifolds
Casting # Left Hand #3880827
Right Hand #3880828

Transmission
Muncie 4-speed,(2.20 only)

Rearend
Corvette IRS, 3.36-4.11:1 gear ratios
* Casting #3869942 blocks were used in some early 1967 cars. The complete casting number #3869942 was ground off and #3904351 was stamped into the block. This has been verified through car #115073. The block had a casting date of E-6-6 with a build date of T0309 JE. As you can see, this was a very early cast 1967 block, which was not built until early March of 1967.

 

 

1967 Corvette Alternators
Engine: 327 Standard, Optional 427
Standard/37amp 1100693 Base Unit, All 327 engines
Opt/55amp 1100694 300, 350, 390 and 400 HP w/AC


Opt/42amp 1100696 Base Unit, 427/390, and 400 HP
350, 390, 400, 435 HP and L88
w/transistor ignition

Opt/61amp 1100750 350, 390 and 400 HP w/AC
and w/or w/o trans. ignition

 

 

1967 Corvette Wheels
Wheels (Regular Production)
Type..........Stamped steel, welded construction
Short spoke spider (rally)
Rim Size......15 x 6JK
Offset........06
Manufacturer..Kelsey-Hayes
Wheel code....DC*
Wheel (RPO N89)
Type..........Ribbed, cast alum. (knock-off)
Rim size......15 x 6 L
Offset.........06
Manufacturer...Kelsey-Hayes
Wheel Code.....None

* This rally wheel was used in the 1967 model year production for the Corvette and Chevrolet Passenger Station Wagon with disc brakes. They are the identical same wheel. The wheel continued in production through the 1969 model year for the Chevrolet Passenger car until late in the model year, when it was superseded by the YS coded rally wheel. This has been verified through Kelsey-Hayes in-house documentation.

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