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Old 04-12-2011, 01:21 PM
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Head casting identification

I have chevy heads casting # 462624 & block casting #3970010 can you tell me the year.

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Old 04-12-2011, 01:30 PM
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462624 350 76-87 1.94/1.50 2.02/1.60 76cc Crack prone
These heads are very light casted and crack prone. All SBC Heads and blocks have the date code casted on them. Here`s a example:
B 5 8 B - The Month B - February 5 - the date, 5th of february.
8 The year - 1978 or whatever years that casting was being cast.
You`ll find the date codes to your heads in the top side of the heads. The blocks date code is on the rear bell housing flange.
3970010 302/350 69-79 145-370 car & Truck 2 & 4-Bolt Most common
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