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Old Aug 2, 2009 | 05:52 AM
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Default help, decode my BB

Hi, can you help me to decode my BB in my 70 vette?
my casting number is 14015445, i found that is a 78-90...on the other side the number is f25-2. do you know the exactly date?
the pad engine is T0722XCH, is a good engine? how can i see if is 2 or 4 bolt?
thanks
in the next days i'll see the head number..
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Old Aug 2, 2009 | 09:18 AM
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I believe that it might be an LS7 crate engine from the early 80s. Very nice find!

Block cast June 25 1982, assembled in Tonawanda NY on July 22.
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Old Aug 2, 2009 | 05:27 PM
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14015445 is commonly used in light/medium duty truck engines. To my knowledge, they are the last breed of MkIV, thus they have the least amount of metal in them, I think they are good enough for up to .060 over bore, but cannot handle .100+.
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Old Aug 3, 2009 | 08:18 AM
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thanks, i found this:
http://i82.photobucket.com/albums/j2.../LS-7STATS.jpg
gooood!
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Old Aug 3, 2009 | 08:48 AM
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Originally Posted by pablito
Hi, can you help me to decode my BB in my 70 vette?
my casting number is 14015445, i found that is a 78-90...on the other side the number is f25-2. do you know the exactly date?
the pad engine is T0722XCH, is a good engine? how can i see if is 2 or 4 bolt?
thanks
in the next days i'll see the head number..
14015445 is a 78-90 454.
f 25 2 date code for June 25th, 2 is year so based on above would be 82.
T0722XCH enigne code, T=Towandowa (sp) engine plant, 0722 is assembly date (July 22nd which is in line with the June 25 casting date), and XCH is useage code and I could not find any listing for a big block with the XCH code.

tom...
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Old Aug 3, 2009 | 09:52 AM
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Originally Posted by Tom73
14015445 is a 78-90 454.
f 25 2 date code for June 25th, 2 is year so based on above would be 82.
T0722XCH enigne code, T=Towandowa (sp) engine plant, 0722 is assembly date (July 22nd which is in line with the June 25 casting date), and XCH is useage code and I could not find any listing for a big block with the XCH code.

tom...
I could not find a XCH useage code either....and I really tried! All the above fall's in place other than that. Maybe the OP needs to re-check the numbers...just don't know?
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Old Aug 3, 2009 | 09:58 AM
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XCH code is known to be for over-the-counter LS7 crate engines.
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Old Aug 3, 2009 | 10:06 AM
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Originally Posted by Mike Ward
XCH code is known to be for over-the-counter LS7 crate engines.
Why would a crate engine use a production line code (factory/assembly date/usage code) and not a CE code?

tom...
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Old Aug 3, 2009 | 10:51 AM
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CE's were short blocks, not complete engines. I believe most recent GM crate engines have a conventional stamp pad ID.
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