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350 Crate Engine

Old Aug 5, 2010 | 10:39 AM
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JD4Bolt's Avatar
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350 Crate Engine

How much horsepower does a 350 4-Bolt Main 4" bore with casting # 3970010 have?
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Old Aug 5, 2010 | 11:21 AM
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From: Pigeon Forge ,TN
Car: Firebird
Engine: 2.8 v/6
Transmission: t/5
Axle/Gears: open/3.42
Re: 350 Crate Engine

My '77 GMC truck was rated about 260 . It all depends on the heads and cam you have on a stock bore and stroke .
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Old Aug 5, 2010 | 11:40 AM
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From: NW Houston
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Re: 350 Crate Engine

that casting number has been used and abused forever in '72 trucks it was rated 170 hp. Im sure that same block was used in the vette that year, and as you can guess had considerably more power. So it just depends on what you have there.

~Couch
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