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Old 10-09-2007, 10:50 AM
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Help Identifying Small block please???

Hey Y'all,

I am getting more "ED u mukated" in reading blocks but this one I got has some new markings to me can you help?

The block casting # is a typical 3970010 but there is a big 25 embossed there.

Now on the back of the block on the pass side by the fly wheel there is a
010
020 {is this a high nickle block ? }
& on the other side there is a H41

On the or above the oil filter mount there is :
371
386.. or 388 {its hard to read until I can get to clean on it}
And 118 13 N the "118 & the N" are embossed" but the 13 is stamped .

Also they are upside down all the ones I have seen have been like regular reading where the motor is in place .

....last one


On the front of the block is these #'s: 0409CNN

Well thanks in advance for the help.






Rob
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Old 10-09-2007, 11:06 AM
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According to the information I can find the block can be any 302, 327 or 350 from 1969 to 1980 the "CNN" stamp tells me it's a 1970 block 2 or 4 bolt main, 350cid, 250hp 2 barrel carb.

Vince
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Old 10-09-2007, 12:41 PM
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As a side note ...
every SBC engine code I ever saw that was just 2 letters ... was a 69 and back engine. Three letters started in 1970 ... as far as I can tell.
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Old 10-09-2007, 06:25 PM
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Not necessarily. I've got a '65 327 marked "HCH".
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Old 10-09-2007, 07:12 PM
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Well screwed again
It was traded for labor {years ago}

It was supposed to be a .030 4 bolt main well its a 2 bolt but it does look like it has new pistons .@ least from the bottom.

is there any way to check to see if it has over sized pistons with of pulling off the heads?


Thanks
Rob
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Old 10-09-2007, 07:23 PM
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Rob,

You have a 1970 Camaro, CNN, 350-250 HP with a turbo 350 trans. As for the 010 casting number they made 1000's of them everything from high performane to base motors and they came with 2 and 4 bolt mains. It's a good engine with good compression ratio.
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Old 10-09-2007, 08:11 PM
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010s are good blocks Get you some 4 bolt caps and add a cam etc
Shane
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Old 10-09-2007, 09:14 PM
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It was supposed to have been rebuilt shortly before & got it & it was supposed to be slightly cammed .

I'm Putting it in my 85 BURB with the 700R4 4:10

I hope it don't need premium to run on .

I took it out of a van put it in a Elcaminio now its out again no mileage added to it [not counting how many times I have moved it ]

Going to put freeze plugs gaskets & that stuff & stuff it in the hole & see what it does.

I might pull the timing cover to peek @ the cam.
Ill take some better pixs soon

thanks alot


Rob
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