How do I tell casting dates on 452 and 346 heads

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How do I tell casting dates on 452 and 346 heads #2273551 03/21/17 10:44 AM 03/21/17 10:44 AM
Joined: Dec 2011 Posts: 131 Boston, MA J johnnyd OP member
johnnyd OP member J Joined: Dec 2011 Posts: 131 Boston, MA	How do you read the casting date on big block heads? On 906 heads made '68-'70, I think it's easy. For example I see under the valve cover is a code attached near the cast part number. For example on a 906 head one might see 11269 which would be November 26, 1969. I think I have it down for the 452 heads which were made '76-'78. A 452 head might have the numbers 1677. Is that the 167th day of 1977? On 346 heads which were from '71-'73 I can't figure it out. A 346 head with 2230. I am thinking 223 day of 1970 but I thought the 906 head was 1970. Please help!

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Subject	Posted By	Posted
How do I tell casting dates on 452 and 346 heads	johnnyd	03/21/17 02:44 PM
Re: How do I tell casting dates on 452 and 346 heads	JohnRR	03/21/17 05:01 PM
Re: How do I tell casting dates on 452 and 346 heads	johnnyd	03/22/17 07:11 PM

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