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Old 05-03-2009, 09:41 PM
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engine numbers

im looking to buy a good 350 to build into a 383 stroker with 500 plus horses and place in my 1985 chevy.. im looking at this specific engine and im wondering if it is a good motor.. im new and i cant tell if its a 350 or not... the numbers on it are 3970010 v0708cmj 15j253166 help?
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Old 05-03-2009, 09:42 PM
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Old 05-03-2009, 09:47 PM
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howdy there 3970010 and cmj is 350

ive owned a billion cmj stamped 350 engines over the years

it has to be about the most common 350 stamping out there

and 3970010 is probably the most common 350 casting as well about 95% of all the ones i have had have been this casting code

welcome to HR forums


have fun!
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Old 05-03-2009, 09:51 PM
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Quote:
Originally Posted by fast68
3970010 and cmj is 350

ive owned a billion cmj stamped 350 engines over the years

it has to be about the most common 350 stamping out there

and 3970010 is probably the most common 350 casting as well about 95% of all the ones i have had have been this casting code


have fun!
you wouldnt happen to know if its a 2 or 4 bolt main would you... just by looking at the numbers? or is my best bet taking the oil pan off.. btw where can i get my hands on a set of 2482 main caps?
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Old 05-04-2009, 08:38 AM
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Quote:
Originally Posted by BrentA1985
you wouldnt happen to know if its a 2 or 4 bolt main would you... just by looking at the numbers? or is my best bet taking the oil pan off.. btw where can i get my hands on a set of 2482 main caps?
You'll need to take a look to see if it's a 2- or 4-bolt.

I don't know about "2482" caps, but if you're thinking of using different caps on a 350, your best bet is to start w/a 2-bolt block and convert it to 4-bolt caps- using splayed caps.
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Old 05-07-2009, 02:23 AM
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Keep in mind also if you switch main caps the block will have to be line bored. A 2 bolt block with studs that`s line honed will handle 500 horses. If this is a basic street machine you maybe setting your goals on the high side.
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Old 05-07-2009, 06:14 AM
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I am not going to guarantee this, only what some one said and I have noticed this to be true a couple of times. So if it is not correct I don't want to here a bunch a people emailing in calling me an idiot (I already know that). Right above the timing cover , facing it, on the block, on the left, if there is a screw in plug around a 1/4 inch diameter with a square head then it is suppose to be 4 bolt. Again read the first line!
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Old 05-09-2009, 08:26 PM
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howdy there again

well, you will never know if its a 2 or a 4 bolt main bolt block until you pull the pan and look.

most likely it is 2 bolt because it is a car block of the '70s era.

and most car ones of this era were 2 bolt i have found

from my own experience of owning and seeing this casting and stamping suffix code 350 engines over the years

most blocks have this oil gallery plug you speak of,

nothing to do with main bolts quantity

splayed 4 bolt will be the best strength, although splayed it not stock. otherwise 2 and 4 bolt in stock form really are virtualyl the same strength,

and besides, only the three middle main caps are 4 bolt

but if you want a factory 4 bolt main block then find a truck 397001 or 3970014 etc., unless you can manage to find a high HP car application 4" bore block, but good luck there. getting rare these days.

converting a block to splayed mains would be the way to go if you are concerned with strength., although main strength is not an issue with sbc engines, and very rarely is.

weak points to worry about will be other things, such as crankshaft material, and rods, etc.


have fun!!

Last edited by fast68; 05-09-2009 at 09:38 PM.
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Old 05-09-2009, 10:08 PM
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Quote:
Originally Posted by fast68
howdy there again

well, you will never know if its a 2 or a 4 bolt main bolt block until you pull the pan and look.

most likely it is 2 bolt because it is a car block of the '70s era.

and most car ones of this era were 2 bolt i have found

from my own experience of owning and seeing this casting and stamping suffix code 350 engines over the years

most blocks have this oil gallery plug you speak of,

nothing to do with main bolts quantity

splayed 4 bolt will be the best strength, although splayed it not stock. otherwise 2 and 4 bolt in stock form really are virtualyl the same strength,

and besides, only the three middle main caps are 4 bolt

but if you want a factory 4 bolt main block then find a truck 397001 or 3970014 etc., unless you can manage to find a high HP car application 4" bore block, but good luck there. getting rare these days.

converting a block to splayed mains would be the way to go if you are concerned with strength., although main strength is not an issue with sbc engines, and very rarely is.

weak points to worry about will be other things, such as crankshaft material, and rods, etc.


have fun!!
I had some one tell me this about the "oil gallery plug" and the 4 bolt main, since then I have seen two 010 blocks with the plug and they both had 4 bolt mains and one with out and it was a two bolt main block, I don't know maybe just coincidence. But I will keep looking just out of curiosity. It probably doesn't make difference so that is why I said I did not know in my first post. If it was true I thought I would have heard about it a long time ago. I agree with you 100% about difference in strength of a two bolt and a four bolt block " main strength is not an issue with sbc engines, and very rarely is."
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