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engine identification: 235 Chevy's

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Jim G

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I will appreciate some assistance in identifying the year of production of two Chevy 235 engines. I have checked the book Catalog of Chevy Truck ID numbers 1946 - 1972 but I haven't been able to identify the engines' years of production.
One engine has the following numbers near the distributor: FI026J
I presume this is a Chevy engine since the valve cover sez Chevrolet.

The other engine has the following numbers (and very hard to read because of scratches: F4I5U (or maybe W).
To the right of this set of numbers is the following: KAA1028-48

Any ideas or answers.
thanks.
Jim G
 
On the right hand side of the engine block, behind distributor, are a few casting numbers. Typically near the rear something like 'CON3', then in front of that will be something like 'J255', Where the J represents 10th month, then 2nd day, and 55 for 1955. Check yours and see if this holds true. Here's a couple of pictures of mine.
 

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Thanks to Bilbo on checking the engine code. I did check on the two engines and found the info but it is confusing.
On the first engine (which is a demo engine in a high school auto shop) the code found is: CON4 J240. If I use the method you listed - J equals the month, 2 is the day and 40 is the year which doesn't seem possible for a 235.

The other engine is in a 53 Chevy and was installed in January, 1968, the code I could see was fuzzy and seems to read CON (can't make out the number) and then D148. which would be April, the first, and 1948. Again, doesn't seem to make sense.

HELP. I will try to send some pics. Thanks.
Jim G
 
J240 would be Oct 24 of year 0, not Oct 2 of year 40.
D148 would be April 14 of year 8, not April 1 of year 48.

Don't forget that they made 235 engines into 1962, so those date codes could be 1960 and 1958 instead of 1940 and 1948.

Computer geeks continue reading ....
GM was way ahead of the computer industry. They had the Y2K problem long before Y2K.;)
 
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Jim, here's something else you can try to hone in on the identification of your engines. Check the casting numbers on the engine block and on the cylinder head. They won't neccessorily give you the exact year, but it will give you a range of years that the block and/or head was produced for that particular engine.
 
Just a guess, but I think it's probably "Conveyor 1" as in... it was produced on line one of the foundry that made the blocks.

Damon
 
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