number stamp
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Tuned
Joined: Dec 2007
Posts: 323
Likes: 8
number stamp
Hey fellas. I have a 400 block I am using to build a motor for my 1979 F250. I found a number stamped at the rear of the motor near the hgole for the oil pressure sender. It is 5H123567. Does anyone know what this number means? Its a 1974 400 block.Thanks
Fleet Owner
Joined: Dec 2009
Posts: 20,678
Likes: 83
From: NorCal
Is it cast (raised) or actually a "stamp"? If cast, then it's probably a foundry number.
And if it's a 1974 400 block then it wouldda come out of a passenger car like an LTD, County Squire, or other related behemoth.
And if it's a 1974 400 block then it wouldda come out of a passenger car like an LTD, County Squire, or other related behemoth.
Ford Parts Specialist
Joined: Nov 2006
Posts: 88,826
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From: Simi Valley, CA
A = January, M = December, the letter I is skipped.
Fleet Owner
Joined: Dec 2009
Posts: 20,678
Likes: 83
From: NorCal
Sorry.. no idea on the stamping. However, some rebuilders attach a tag. Perhaps a previous rebuilder used a stamp.
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Tuned
Joined: Dec 2007
Posts: 323
Likes: 8
Thanks guys . My curiosity is killing me. I did not know the date code was on the front of the block. The other number , I just don't know. The block has been checked by a machine shop as being original bore sizes. We are going to bore it .030 over. Funny thing is , I have 2 other blocks, both 351m, but no stamps like this one has.
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