V-12 identification help please

[Semo]

Where do I find the identifying numbers on this engine to determine the year ? 
 

 

[19tom40]

See this topic  https://forums.aaca.org/topic/79197-need-help-identifying-age-of-v12/

 

[Semo]

Ok thanks for that link.  
so do you think this is marked 58H

or 56H   ?   It sure looks like 58H but your link says there is no such thing . 

it’s supposed to be out of a 46 Lincoln 

 

the heads are clearly marked 26H 6050.  And 26H 6049

Edited November 8, 2020 by Semo (see edit history)

[19tom40]

Unfortunately I cannot verify the casting information as having any significance. Maybe someone who has had several of these engines apart may have better information. Most of the casting numbers were put on by the foundry to help with tracking production problems and their significance was not published to my knowledge.

[Colin Spong]

56H denotes post war engine 1946-48 

[Semo]

Found another one ,   
 

so,  how do you date this one ? 

 

There are no other markings on this block.

[Semo]

Must be so rare no one knows how to respond .

[38ShortopConv.]

Could be a casting number.

[alexdragone1]

I would be interested in buying this engine from you if you want to sell it and if it is not cracked between the valves. Let me know! Thanks 

[19tom40]

Some engine cracks between the valves can be repaired by stitching(drilling and plugging a series of holes along the crack). The V-12 blocks are becoming rare, so it is a good idea to try to save some of the ones with repairable damage.