The EIN is typically located on the front or side of the engine block, near the distributor. It is a series of characters, usually consisting of letters and numbers. The first character of the EIN is the engine code, which indicates the engine's displacement and other specifications. The second character is the year code, which indicates the year the engine was manufactured.
Here is a breakdown of the year codes used on Chevy 350 5.7-liter engines:
* A - 1968
* B - 1969
* C - 1970
* D - 1971
* E - 1972
* F - 1973
* G - 1974
* H - 1975
* I - 1976
* J - 1977
* K - 1978
* L - 1979
* M - 1980
* N - 1981
* P - 1982
* R - 1983
* S - 1984
* T - 1985
* U - 1986
* V - 1987
* W - 1988
* X - 1989
* Y - 1990
* Z - 1991
For example, if the EIN on a Chevy 350 5.7-liter engine is "C12345", the year code is "C", which indicates that the engine was manufactured in 1970.
In addition to the EIN, some Chevy 350 5.7-liter engines may also have a date code stamped into the block. The date code is a four-digit code that indicates the month and year the engine was manufactured. The first two digits of the date code indicate the month, and the last two digits indicate the year.
For example, if the date code on a Chevy 350 5.7-liter engine is "0391", the month code is "03", which indicates that the engine was manufactured in March, and the year code is "91", which indicates that the engine was manufactured in 1991.