CON 2 refers to Conveyor 2 at the engine plant and J (Oct) 2 (2nd) 5 (1965). As far as I know all 292 are tall deck engines meaning that they have blocks that are taller by about 1-3/4" than a 230-250 which are the same block but use different strokes. Your block number was cast from 63'-66'.
This is my understanding of these engines.

The number on your head likely is from being a replacement head.


1953 Chevy 5-window 3100
In the Stovebolt Gallery
More pix on Picturetrail

Dave
Engine & Driveline Moderator

If you can't make seventy by an easy road, don't go. ~~ Mark Twain