Engine Id
Race Director
Joined: May 2006
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CF Community Team
Joined: Mar 2007
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From: Delaware
St. Jude Donor '25
Trying to research and help. Is your block an 010? I was reading something that said the first set may be the block casting number abbreviation (separate from the full number).
I am reading that the 010 (350) and 020 (307) shared the same mold when cast. Maybe the 010 020 are a reference to that? Still looking for the other number meaning but I did notice it seems cast further down spacing wise than the top sets.
I am reading that the 010 (350) and 020 (307) shared the same mold when cast. Maybe the 010 020 are a reference to that? Still looking for the other number meaning but I did notice it seems cast further down spacing wise than the top sets.
Team Owner
Joined: Feb 2003
Posts: 53,719
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From: Sitting in his Nowhere land Hanover Pa
2024 C2 of the Year Finalist - Unmodified
2015 C2 of Year Finalist
Trying to research and help. Is your block an 010? I was reading something that said the first set may be the block casting number abbreviation (separate from the full number).
I am reading that the 010 (350) and 020 (307) shared the same mold when cast. Maybe the 010 020 are a reference to that? Still looking for the other number meaning but I did notice it seems cast further down spacing wise than the top sets.
I am reading that the 010 (350) and 020 (307) shared the same mold when cast. Maybe the 010 020 are a reference to that? Still looking for the other number meaning but I did notice it seems cast further down spacing wise than the top sets.
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Team Owner
Joined: Feb 2003
Posts: 53,719
Likes: 9,227
From: Sitting in his Nowhere land Hanover Pa
2024 C2 of the Year Finalist - Unmodified
2015 C2 of Year Finalist
Team Owner
Joined: Feb 2003
Posts: 53,719
Likes: 9,227
From: Sitting in his Nowhere land Hanover Pa
2024 C2 of the Year Finalist - Unmodified
2015 C2 of Year Finalist
Melting Slicks
Joined: Nov 2006
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From: Apple Valley, MN
Team Owner
Joined: Sep 2006
Posts: 31,037
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From: Westminster Maryland
Hello mg71,
I can't help with cast numbers or letters.....
so how about a little trivia?????
Regards.....
What was the purpose of the 'freeze plugs' ?
The blocks were cast in sand molds.
The blocks were "shook" to get the sand out and then the plugs were installed.
Remember the small block engines for all Corvettes and for other Chevrolet car lines were built at the Flint engine plant....at a rate of 5000 engines per day (2 shifts).
All the info is from John Hinkley.
I can't help with cast numbers or letters.....
so how about a little trivia?????
Regards.....
What was the purpose of the 'freeze plugs' ?
The blocks were cast in sand molds.
The blocks were "shook" to get the sand out and then the plugs were installed.
Remember the small block engines for all Corvettes and for other Chevrolet car lines were built at the Flint engine plant....at a rate of 5000 engines per day (2 shifts).
All the info is from John Hinkley.
Team Owner
Joined: Feb 2003
Posts: 53,719
Likes: 9,227
From: Sitting in his Nowhere land Hanover Pa
2024 C2 of the Year Finalist - Unmodified
2015 C2 of Year Finalist
020 is the last three digits of a 307 block Not sure on the 147 but they used the same casting sand pattern the casting number on the bellhousing flange numbers could be changed out unlike these numbers