What is the exact year of my engine?

[Shannon Conner]

Here are the codes: from above water pump: T1216XXY3, from back passenger side flange: H7 2, from driver side rear flange:473478
Why do I want too know? I been asked many times. Who cares? If you can help,please help, if not, please move along. I am that guy who knows what hes got. I take pride in my accuracy.

 

[Grumpy]

what are the head casting numbers and what was the full vin number?
that info and the trucks vin number would provide additional related info


link and useful sub linked info
http://garage.grumpysperformance.com/index.php?threads/vin-casting-info.10474/#post-44012

links to casting numbers and info

http://chevellestuff.net/qd/engine_stamp_numbers.htm http://www.mortec.com/bbc.htm http://www.nastyz28.com/chevy-engine-code-stampings.php http://www.thecamaro.com/Decoding/Chevy ... ecoder.php https://www.corvetteactioncenter.com/specs/c2/1964/64id.html...

garage.grumpysperformance.com

heres what I found so far

T= cast in Tonawanda

T1216xxy3= cast dec 16

473478=tall deck 427 truck 1968-84


Big block on the right side of engine above the oil pan rails.


I CAN'T READ that IN THE PICTURE MIGHT BE 1972


Casting Date Example: E038 - (E = Month, 03 = Day, 8 = Last digit of model year (1978)).

Month: A = Jan, B = Feb, C = Mar, D = Apr, E = May, F = Jun, G = July, H = Aug, I = Sep, J = Oct, K = Nov, L = Dec


Casting Clock
On some Saginaw blocks, intakes and exhausts a "clock" was cast into the block. The clock is a circle of 10 dots, one dot for each hour of a shift (usually 10 hour shifts). An arrow points to the beginning of the shift an another dot outside the circle indicates what time of day the cast part was made. Anyways, that's what that circle thing is (if you happen to see it on something).

 

[Shannon Conner]

Above the oil pan rail is just a clock nothing else. On the back it looks like M or H 7 2. It is deformed. Stupid casting. Can't make out the letter. Above oil filter it says TRU K 17.

 

[Shannon Conner]

The cylinder heads have written on them 366. Then the numbers are for a 366 based on this site.