Researching the details of the Chevy II and Nova

Projects

1962 1963 1964 1965 1966 1967 1968 1969 1970 1971 1972 1973 1974 1975 1976 1977 1978 1979

Research Topic: 1970 LT1 Engine Original Markings and Details

These photo's were taken of a low mileage block belonging to and courtesy of Mike Thorpe here in Calgary. Mike is involved in the restoration trade, and Graeme Browne asked him for the pictures so that they could be provided for research.

This is the rear view of the 1970 LT1 Engine Block. Note markings on the rear of the cylinder heads show the original engine paint.

Picture 1

This is a closer view of the rear of the engine.

Picture 2

Here you see a closer view the intake manifold and distributor. Note the orange over spray on the intake. especially under the engine lift bracket. There is a daub of yellow paint on the distributor.

Picture 3

This is a view from the driver's side. Take note of the CTB engine code that was written when the engine block was upside down just between the oil pan and the cylinder head. CTB was the code stamped on the engine pad. See below.

Picture 4

This picture shows the different cylinder head bolt markings on the front of the driver's side cylinder head. The AC spark plug has the four green rings. The thicker first ring was used in the 1970's while a late 1960's plug would have four even rings. Note the shape of the spark plug boot.

Picture 5

This view from the front showing the top of the engine.

Picture 6

This is a view shows the stamping on the front of the carburetor.

Picture 7

Closer view of the stamping and the 6333 stamped into the carb.

Picture 8

More stamping and the GM part number 3972121 with the Holly List number 4555 and date code 021.

Picture 9

Even more stamping.

Picture 10

Additional stamping on the side of the air horn. Note the coloration of the overall carb.

Picture 10

This view of the front that shows the water pump.

Picture 11

Paint stick marks on the side of the cylinder hear.

Picture 12

Paint Stick "4" on the side of the passenger side cylinder head. Note the hole in the exhaust manifold for the smog tube.

Picture 13

CTB and another mark on the passenger side of the engine block..

Picture 14

Here's a view of engine stamping on the engine in front of the passenger side cylinder head. "V0707CTB"

Picture 15

This picture shows the distributor without the cap. Note the shield that covers the points under the rotor.

Picture 16

Here is the view from the driver's side rear of the engine.

Picture 17

Here is the date code.

Picture 18

Here is the engine part number casting.

Picture 19

Here is another view of the engine pad.

Picture 20

View of the intake and carb from the passenger side.

Picture 21

Picture of the passenger side front that shows the water pump and A.I.R. pump mounting, alternator mounting, and pulleys.

Picture 22

Alternator pulley part number stamp 3829387-AI

Picture 23

Water pump pulley.

Picture 24

View of the front drivers side corner of the intake manifold. Note the engine paint over spray on the aluminum.

Picture 25

View of the passenger side front of the intake. Again note the engine paint over spray in the intake manifold.

Picture 26

Same view as the last picture. Just a slightly different angle.

Picture 27

Head part number 3927186 and casting date F230 (June 23, 1970)

Picture 28

Valve cover part number close up

Picture 29

Underside of the valve cover.

Picture 30

Overview of the cylinder head and valve cover.

Picture 31

Silver paint found dripped on the top of the cylinder head.

Picture 32

Same view as the last picture. Note the cylinder head casting date. F 9 0 (June 9, 1970)

Picture 33

Silver paint on the valve springs.

Picture 34

Close up of the same silver paint on the valve springs.

Picture 35

More paint on the valve springs.

Picture 36

And more paint

Picture 37

Manufacturer stamping on the fuel line bracket.

Picture 38

Same view as the last picture. Just a slightly different angle.

Picture 39

Head part number 3927186 and casting date F 90 (June 9, 1970)

Picture 40

Front of the driver side cylinder head. Note that the paint of the "X" is under the orange engine paint. It acted as a primer and allowed the orange to show up better.