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Old 06-18-2013, 08:33 PM
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mystery motor

Hey guys looking for some help to identify my motor. I ran the vin V10130KL on the front passenger tab with two dealers and it came back the same, a 67 327cid 275 horse. The problem is; the same block has a 3970010 casting number which didn't start till 68 supposedly. I don't have the origional heads or any other indicators that I know of just the conflicting digits. Thanks for the help!

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Old 06-18-2013, 08:48 PM
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Originally Posted by Asphalt View Post
Hey guys looking for some help to identify my motor. I ran the vin V10130KL on the front passenger tab with two dealers and it came back the same, a 67 327cid 275 horse. The problem is; the same block has a 3970010 casting number which didn't start till 68 supposedly. I don't have the origional heads or any other indicators that I know of just the conflicting digits. Thanks for the help!
Across the back of the block from the casting number is the casting date. See what that is. 0130 should be Jan 30. Block cast date should be around A257
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Old 06-18-2013, 08:59 PM
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The other numbers are hard to make out but it looks loke A122 is printed on a tag attached to the block at the rear. There is also a teardrop shape with the letters T, N, and D around it. The D is indicated.
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Old 06-18-2013, 09:11 PM
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Originally Posted by Asphalt View Post
The other numbers are hard to make out but it looks loke A122 is printed on a tag attached to the block at the rear. There is also a teardrop shape with the letters T, N, and D around it. The D is indicated.
Casting clock.. Block was cast on day shift. In Saginaw Mich.
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Old 06-19-2013, 10:21 AM
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Originally Posted by Asphalt View Post
The other numbers are hard to make out but it looks loke A122 is printed on a tag attached to the block at the rear. There is also a teardrop shape with the letters T, N, and D around it. The D is indicated.
A122 would be January 12th of 1972. Doesn't line up with the assembly stamp on the front pad. Are you sure about the stamp ?? They can be faint and hard to read. OR it was restamped for some particular reason.
Measure the bore. That is a good indicator of engine displacement. A '72 block would only be a 350.. 327 was discontinued mid-year of '69.
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Old 06-19-2013, 02:56 PM
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Originally Posted by Asphalt View Post
The problem is; the same block has a 3970010 casting number which didn't start till 68 supposedly.
Believe nothing that you hear and only half of what you see. Nobody knows the first time GM cast up a 010 block for sure.
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Old 06-19-2013, 05:25 PM
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Originally Posted by Too Many Projects View Post
A122 would be January 12th of 1972. Doesn't line up with the assembly stamp on the front pad. Are you sure about the stamp ?? They can be faint and hard to read. OR it was restamped for some particular reason.
Measure the bore. That is a good indicator of engine displacement. A '72 block would only be a 350.. 327 was discontinued mid-year of '69.
They are both 4 in bore so it wont do any good to measure it ,The stroke is what is different,,the 327 is 3.25 stroke .the 350 is 3.48 and a 302 is 3 in .also a 67 327 is a small journal ,68 up are large journal cranks ,iSounds like you have a 350 some one tried to pass off as a 327 Restamped ,,,a 68 327 and a 68 350 and 302 will have same casting # 3970010 on rear of block as the difference is in crank IF it is a small journal look at the crank seam it should have a steel crank ,a large journal could be either.
one other thing does it have vent tube under the distrubitor or pcv in valve cover.

Last edited by 496CHEVY3100; 06-19-2013 at 05:31 PM.
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