I've got one too. I'm rather disappointed about my 1951 truck that I'm starting to work on. I suspect that the engine isn't the original. Any help decoding this engine would be appreciated. Here's my info
Block casting code: 3769716
(BDCC)Block date casting code: CON4 D 10 2
Near BDCC is an 18 which is upside down and crocked
To the right of BDCC In large letters there is a GM 23
Engine serial number: F04I2J
Also on passengers side is B59 848 850
Head casting code: 3836848 With GM 17 under it
Number on header: 3754844 or 8754844 with GM under it
From what I have looked up it appears to be a 1958-1962 but I would like confirmation and maybe a little more info like a month or place of manufacture or what it was in before. Thank you