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350 chev engine code help

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Old 05-01-2008, 12:05 AM
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350 chev engine code help

i got the engine number off my block on the driver side it is 3970010
all i could find out with it is this

1969-79 350ci 185hp low-370hp high-2 or 4 bolt main-car, truck, Vette
Can you tell more from it?
----------
also, as a side question, it has a giant harmonic balancer what does this mean?

Last edited by DirtyCanadian; 05-01-2008 at 12:09 AM. Reason: Automerged Doublepost
Old 05-01-2008, 02:28 AM
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Car: 82 Berlinetta/57 Bel Air
Engine: LS1/LQ4
Transmission: 4L60E/4L80E
Axle/Gears: 12B-3.73/9"-3.89
Very common 70's block. Nothing special about it. Used in trucks to Vettes.

A large harmonic damper is typically a good thing. However, design is more important than size, condition comes right after that - most likely this one is a factory damper.
Old 05-01-2008, 02:56 AM
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Re: 350 chev engine code help

check behind the timing chain cover for a 10 20 casting on the block, it might be a high nickel block, witch dont amount to much other than it might be a little stronger block then normal, more ware resistant then anything....
Old 05-01-2008, 04:01 PM
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Re: 350 chev engine code help

Groan....

It's an 010 block, the single most common engine casting on planet earth.
I have one. Heck, I bet 75% of this board has that block casting #.
Nothing special or unique. Just use it and go from there. Should have an 8" damper, just like all other 350's.
Old 05-01-2008, 08:02 PM
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Re: 350 chev engine code help

its larger than your average damper, biggest one i ever had on any of my small blocks
it has been balanced would that require a damper mod?
the motor has had 2500$ worth of work not including some parts so i dunno if it requires it, but im sure its like that 4 a reason.
Old 06-14-2008, 07:16 PM
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Re: 350 chev engine code help

so how do i tell what horsepower this 350 had?
Old 06-15-2008, 10:27 PM
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Re: 350 chev engine code help

Take it to a Dyno!
Old 06-15-2008, 11:48 PM
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Re: 350 chev engine code help

Originally Posted by DirtyCanadian
so how do i tell what horsepower this 350 had?
Is it still complete? Assuming it's still original, give me the stamped numbers in front of the passenger side head.
Old 06-16-2008, 08:40 PM
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Re: 350 chev engine code help

no its not original i was hoping to tell from the block.
Old 06-16-2008, 10:26 PM
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Transmission: 4L60E/4L80E
Axle/Gears: 12B-3.73/9"-3.89
Unless you are installing it unmodified, it really doesn't matter what it once had.
Old 04-28-2009, 06:08 PM
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Re: 350 chev engine code help

Ok Got another one same cast number but I got more numbers, I have some numbers but no resources for them, Its numbers are 101198670 K0625CNR I know what its third number is 3970010, it tells me same as my other 350 but this one is different. The first two numbers i guess are supposed to tell you everything. Anyone have the resource for the first two numbers found above the head towards the intake?
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