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Chevrolet Small Block Parts Interchange Manual Chevrolet Small Block
Parts Interchange Manual
by Ed Staffel
Beginning with the earliest small block and carrying through the
very latest "Gen III" models, CHEVROLET SMALL BLOCK PARTS
INTERCHANGE MANUAL provides complete factory parts
interchange information, allowing the hot rodder to custom-build
his own high performance version of the famous Chevy "Mouse"
motor from off-the-shelf parts. Includes factory numbers, casting
marks, production histories, suppliers, component performance
capabilities, etc.

1 Left in Stock, Order Soon! More on their way!


This is a great book and one that any
enthusiast will love!
View Sample Pages
1)
Engine Blocks
2) Crankshafts
3) Oil & Lubrication System
4) Timing Chains & Covers
5) Cylinder Heads
6) Intake Manifolds
7) Ignition Systems
8) Gaskets
9) Exhaust Manifolds
Condition: NEW
Softbound
8.5 x 11-inches
144 Pages
300 B/W Photos
Item: SA55P
Price: $22.95
Click here to buy now!


Small Block Chevrolet Engine Blocks
Block casting numbers are found on the ledge to the rear of the number seven cylinder on the driver’s
side of the smallblock V-8s. The casting date of the block can usually be found on the rear of the
case on the passenger side of the block, on a ledge behind the number eight cylinder of the block.
Some block casting dates are found at the rear on the driver’s side. When you look at casting
numbers and stamped numbers, in any part surface, sometimes the numbers are not as crisp and
clear as they could be. Sometimes an “8” looks like a “3” or a “6.” Also, individual digits in a number
may be missing. The last number digit may be missing or perhaps it just can’t be discerned by the
eye. At times, Chevrolet ground off the cast number and replaced it with a number stamped by hand.
These were rare instances, but they did occur.
A GM engine block casting number
The block casting number
“3789935” is found on a ledge
at the rear of the block on the
driver’s side. The number on
this block identifies it as a 283.
Casting dates are usually expressed this way, “C 18 4.” In this example, the “C” means the month of
March, “18” is the day of the month, and “4” is the last digit of the year. This last digit may mean ’64, ’
74, ’84 or ’94, so you must also check the other characteristics of the block to determine in which
decade and year it was made. Some parts have the decade and year cast on them; these identifiers
look like this: “C 18 84.” GM introduced new model years in September or October of each year, so
when you see a casting date of “L 16 7” for example, this indicates a casting date used in the 1968
model year because it translates into December 16, 1967. A 1968 model Camaro assembled on
January 6, 1968, might contain a number of parts that were cast in December, 1967. Casting dates
should precede hand-stamped engine assembly dates.
The block casting date located at the rear of the engine Engine assembly date code
The block casting date, which is the date the
block was made, is found on a ledge at the
rear of the block. This is not the date when the
engine was assembled.
The engine assembly date and the suffix code
tell you about the original engine and vehicle
in which the motor was placed. This
information is usually found on a ledge on the
front of the engine block on the passenger
side. “F 0622 D” tells us that this engine was
assembled in the Flint, Michigan, plant (F); in
the sixth month (June); on the twenty-second
day. The “D” suffix code in that year (1961,
which is found with the block casting date code
at the rear of the block), indicates a full-size
Chevrolet body style with a 283/170hp motor
and Powerglide transmission. Many later
blocks also have a portion of the V.I.N.
stamped in this same location.
A block with the casting date of F 18 1 or May 18 1961
A block casting date of “F 18 1” is found at the
rear of this block and translates to May 18,
1961. The “F” stands for the fifth month of the
year.
The engine assembly date and which factory assembled the engine are indicated by numbers and
letters that are stamped into the block when the engine is assembled and placed into a specific
vehicle at the factory. These stamped letters and numbers are usually found on a ledge forward of
the number two cylinder on the passenger side deck of the block. These stamped symbols are visible
after the motor is assembled. The stampings show the month and day of the month the engine and
vehicle assembly took place. At the end of the stamped symbols, the one-, two- or three-letter engine
suffix-code identifies what type of motor it is, what type of vehicle the motor went into, what type of
transmission was originally mated to the engine and other features. Finally, on later blocks, there are
also numbers that match the last five, six or seven digits of the Vehicle Identification Number (V.I.N.)
that has been assigned to the vehicle.

An example of a hand-stamped engine assembly date and suffix code looks like this: F0213ZE
023456, which translates into an engine assembled at the Flint (F), Michigan, factory on February 13
(the second month, 02, thirteenth day, 13)—years are not stated here—and a 327/250hp engine (in
1965) with a manual transmission and A/C (ZE). The number also indicates that the car was a Chevy II
that was the 23,456th vehicle assembled in the series.

All of these casting numbers and stamped numbers are consulted when someone wishes to determine
if this is a “numbers matching” engine and vehicle. Even more information is available on the trim
tags, V.I.N. plates and “hidden V.I.N.s” and casting numbers, codes and dates, which are found on
other major powertrain components and vehicle frames. Whether the numbers match can be
extremely important to someone who is buying a restored or restorable classic and it can have an
effect on the desirability, originality and value of the vehicle. Knowledge of the correct casting
numbers, date codes, suffix codes and engine assembly code stampings will help a buyer decide
whether a 1965 Corvette with a 327/375hp fuel-injected engine is an original numbers matching car or
not.
If the block has previously been decked, (a machining operation to insure the flatness of the block
surface or to reduce the piston deck to block deck height to “0”), these stamped letters and numbers
may have been machined right off the passenger side block deck surface and may no longer be
visible. Engines that were replaced under factory warranty might use the “CE” suffix code or may not
have any assembly or suffix code information at all. Also, criminals may have restamped the block in
order to fake a more valuable or rare matching numbers block. Be careful! These days some rare
vehicles with rare options have become high-dollar investments. It is possible to fake engine numbers,
trim tags, V.I.N. plates and other documentation, all in an effort to increase the resale value of a
vehicle.

Many late-model smallblocks rate the engine size in liters (such as 4.3L, 5.0L or 5.7L), and this
number is cast into the ledge at the rear of the block on the driver’s side. Also, on late-model blocks,
the last three digits of the block casting number are cast into each side of the block between the
freeze plugs in large, easy-to-read numerals.

A number of changes to the blocks have occurred over the years. Some changes to keep in mind: In
1955, the 265 block did not have an oil filter. The 265 also used a slightly different method of engine
lubrication in 1955 and ’56. These 265 blocks feature two oil passage holes in the block at the rear
cam journal to feed oil to the lifter galleries and heads. This requires the use of a rear cam bearing
that has two matching holes in the cam bearing and a camshaft that has two flats ground  into the rear
journal of the cam itself. If you use an incorrect rear cam bearing or use a camshaft without the two
flats in the rear cam journal, oil will not circulate to the lifter galleries and won’t get to the heads. This
system was changed in ’57. The later blocks have an annular groove in the rear of the block itself and
use a different style rear cam bearing and rear cam journals without flats.
From 1955 to ’58, the rear main seals of blocks used a rope seal. During ’59 through ’85, they took a
two-piece neoprene lip rear main oil seal.
A late model engine casting number
Late-model blocks have their casting
number on the rear ledge of the case
along with the original size of the motor
indicated in liters. This one-piece rear
main seal 350 block (5.7 liters) has a
casting date of “F 25 8,” which means
June 25, 1988.
Next


This has been a sample page from

Chevrolet Small Block Parts Interchange Manual Chevrolet Small Block
Parts Interchange Manual
by Ed Staffel
Beginning with the earliest small block and carrying through the
very latest "Gen III" models, CHEVROLET SMALL BLOCK PARTS
INTERCHANGE MANUAL provides complete factory parts
interchange information, allowing the hot rodder to custom-build
his own high performance version of the famous Chevy "Mouse"
motor from off-the-shelf parts. Includes factory numbers, casting
marks, production histories, suppliers, component performance
capabilities, etc.

1 Left in Stock, Order Soon! More on their way!


This is a great book and one that any
enthusiast will love!
View Sample Pages
1)
Engine Blocks
2) Crankshafts
3) Oil & Lubrication System
4) Timing Chains & Covers
5) Cylinder Heads
6) Intake Manifolds
7) Ignition Systems
8) Gaskets
9) Exhaust Manifolds
Condition: NEW
Softbound
8.5 x 11-inches
144 Pages
300 B/W Photos
Item: SA55P
Price: $22.95
Click here to buy now!


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