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Is this 6.0L a blem block?

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Old 12-12-2006, 12:22 AM
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Default Is this 6.0L a blem block?

It has the "6.0L" circled in blue and it has some tannish color spray paint on the front, back and inside the valley. Anyone know? Also noticed that the "6.0" is inscribed, not cast, is that normal?

J7623
6--5300A
D06 255 06:44
H04
6.0L
12577461
K02
V04
S03
408212:50
1306315:12
709307:48


Here's some pics...







Last edited by DoesSpeedTurnUon; 12-12-2006 at 01:57 AM.
Old 12-12-2006, 12:33 AM
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Were did you get the picture from?

Looks like the new truck L76 which it is a Aluminum 6.0L. Does the L92 and L76 share the same block? Only difference is other than the bore?
Old 12-12-2006, 12:37 AM
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Originally Posted by Bo185
Were did you get the picture from?

Looks like the new truck L76 which it is a Aluminum 6.0L. Does the L92 and L76 share the same block? Only difference is other than the bore?
They were from an ebay auction. Is there any difference between that block and an LS2 block?
Old 12-12-2006, 01:14 AM
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Old 12-12-2006, 01:55 AM
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What all #s can you find on the block? At least we will know for sure what you are dealing with then. List every # on the block you cna find, since im not sure wear the casting # is on these blocks.
Old 12-12-2006, 01:57 AM
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Originally Posted by BIG BAD BLACKSS
What all #s can you find on the block? At least we will know for sure what you are dealing with then. List every # on the block you cna find, since im not sure wear the casting # is on these blocks.
added it to the original post...
Old 12-12-2006, 09:14 AM
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Did you measure the bore? If it's 4.00", what would the difference be in that and the LS2 block?
Old 12-12-2006, 10:21 AM
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How much did that block go for? I was watching that auction and it disappeared. It was listed as an Ls1 block, guess the seller didn't know much.
Old 12-12-2006, 10:51 AM
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Originally Posted by dhdenney
Did you measure the bore? If it's 4.00", what would the difference be in that and the LS2 block?
yes, its a 4.00" bore.


Originally Posted by myss2638
How much did that block go for? I was watching that auction and it disappeared. It was listed as an Ls1 block, guess the seller didn't know much.
Yea, i sent the seller an offer, and he accepted it $600.
Old 12-12-2006, 12:21 PM
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Nice buy!
Old 12-12-2006, 09:10 PM
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Originally Posted by DoesSpeedTurnUon
yes, its a 4.00" bore.
I don't understand, why is this not an LS2 block?
Old 12-12-2006, 09:48 PM
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Originally Posted by dhdenney
I don't understand, why is this not an LS2 block?
Because the 12577461 part # is not an LS2 part number
Old 12-13-2006, 06:21 AM
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Besides the obvious..... Deck different, bore spacing different.......
Old 12-13-2006, 11:13 AM
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Originally Posted by dhdenney
Besides the obvious..... Deck different, bore spacing different.......
So are the cylinders deeper or what? Will a normal LSx crank work in them?
Old 12-13-2006, 12:45 PM
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Bore spacing is the same on all Ls blocks 4.4" as a matter of fact it is the same on all sbc also
Old 12-13-2006, 01:44 PM
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I think that is the Gen IV 6.0 block.

-Geoff
Old 12-13-2006, 02:42 PM
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Originally Posted by DoesSpeedTurnUon
Because the 12577461 part # is not an LS2 part number
I checked that # and it is not a good GM part #
Old 12-13-2006, 03:02 PM
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Originally Posted by White_Hawk
I think that is the Gen IV 6.0 block.

-Geoff
I believe you're right. It's a VortecMax 6.0L Aluminum truck block, made for DOD and VVT.
Old 12-13-2006, 06:40 PM
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Originally Posted by DoesSpeedTurnUon
So are the cylinders deeper or what? Will a normal LSx crank work in them?
Listen, you don't have to be an ***. All I wanted to know is if this is an aluminum 6.0 block and it wasn't an LS2, I wanted to know what it was. Don't know why you can tell other people what it is but you act like an *** to me about it.
Old 12-13-2006, 06:47 PM
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Originally Posted by dhdenney
Listen, you don't have to be an ***. All I wanted to know is if this is an aluminum 6.0 block and it wasn't an LS2, I wanted to know what it was. Don't know why you can tell other people what it is but you act like an *** to me about it.
I'm sorry, i wasn't trying to come across that way. I think i was really trying to understand your question a little bit better. Sorry.


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