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3970016 is a 4-inch bore (chevy 350) engine and is one of the best available factory castings. It features 4-bolt mains and thicker main webs. Believe it was produced from 1967 through 1979. This engine can make great hp and has a lot of nickel in it

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Wiki User

12y ago
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Kenny Handover

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12mo ago
Casting number v0728u5
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Kenny Handover

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12mo ago
Chevy small block v0728u5
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Roger Goodman

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4y ago

high nickel blocks are a myth and always have been.

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Anonymous

Lvl 1
4y ago

id 3970016 casting

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Anonymous

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4y ago

what size is the motor

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Q: What is a gm block casting number 3970016?
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