The engine identification number is F1023FJ. How can I tell what month and day the car was built?
I think it was built in Flint Michigan, either in January or October on the 23rd?
The VIN on the driver's door pillar along with production data will tell you approximately when the car was built.
The casting number for the block will confirm the engine type.
The casting number for the block is on the drivers side, and on the passenger side in the same location is a date code for when the block was cast (3 or 4 letters and numbers?).
Under the valve covers you will find the head casting numbers and similar date codes.
Here are some pictures of the head casting number and block and head date codes for my 4bbl 283 PowerGlide engine.
Engine block:
Casting number from left rear top: 3731548
Casting date code from right rear top: G97 - July 9, 1957
Front right: F7IIFC -- Flint July 11, 1957 - 283, 4bbl, 220hp, Powerglide
Left head:
Casting number: 3731539
Casting date code: D167 - April 16, 1957
Single triangle, no front mounting holes
Near as I can tell from its VIN and the Oakland plant's production data, my 57 was built on July 22nd, 1957.
Since your FI023FJ engine stamping has four numeric digits (the 'I' was used for '1'), I would decipher that as October 23rd (with 1956 implied for the 1957 model year).
Your block's casting number and date code would be helpful to confirm this.
Apparently, it wan't all that rare for the fuel injection to be removed and a traditional carburetor installed :sad0049:. Mechanics often did not have the training to maintain fuel injected cars at the time.
Vic