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04-06-2004, 09:20 AM
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#26 |
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Registered User
Join Date: Mar 2003
Location: Northern Illinois
Posts: 2,181
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It would be interesting to see what the engine codes are. They would tell you the year and application for which the engine was built.
Of course, it STILL might not be conclusive if it was a dealer switch, but it would help to provide evidence. If a 454 wasn't an RPO'd option in '70, then if GM installed it, the COPO code would have to be there, correct? Brian |
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04-06-2004, 09:27 AM
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#27 |
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-Chris
 
Join Date: Sep 2002
Location: Moyock, NC
Posts: 622
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the engine code is the casting number on the back of the motor right? I got that, the code is "3999289" I just need to know how to tell if it is a numbers matching truck or not. Any help would be much appreciated.
__________________
1970 Chevy C-10 P/U, Shortbed, Fleetside - 5/7 drop, 496, TH400, 12 bolt. BUILD THREAD - http://67-72chevytrucks.com/vboard/s...d.php?t=404481 2012 F250 Super Duty P/U - intake, exhaust, tuner, 4" lift with 35's 2017 Chevy Suburban (Wifes Car) - Fully Loaded & Stock "Some people spend an entire lifetime wondering if they made a difference in the world. But, the Marines don't have that problem." Ronald Reagan, President of the United States; 1985 |
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04-06-2004, 09:37 AM
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#28 |
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Senior Member
Join Date: Jan 2000
Location: Cincinnati, Ohio
Posts: 1,492
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If you want to figure out if it is "numbers matching" then you need the numbers from the front pad. They will be stampings. It looks like that engine is a 1973 to me if the is the date casting on the rear of the block.
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04-06-2004, 09:41 AM
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#29 |
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Registered User
Join Date: Mar 2003
Location: Northern Illinois
Posts: 2,181
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No, there's another engine code (or suffix). It's usually on a small deck on the front of the passenger side block. It's not cast, rather it's stamped on at the time the block is assembled into an engine and installed.
As an example, that casting may have been used in dozens of applications from 70-72. When they pulled the casting out of the bin and started assembling it into an engine, they stamped the engine SUFFIX on it, which would tell you for which particular application it was intended. Even more interesting, on some production lines, the engine code included the serial portion of the VEHICLE VIN, which allows you to match original engines to the car they're in. Here's a page which shows you how to decode the suffix: http://www.nastyz28.com/spmenu.html Brian |
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04-06-2004, 10:08 AM
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#30 |
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Registered User
Join Date: Oct 2001
Location: Pittsburgh, Pennsylvania USA
Posts: 461
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Engine Date Stamp
If the date stamp was I 17 73, that should mean production in September 1973, difficult to install in a 72 truck ?? Just to make us think and dig for more info.
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04-08-2004, 09:29 PM
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#31 |
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Registered User
Join Date: Oct 2000
Location: From Chicago, Live in Phoenix, AZ
Posts: 6,802
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3999289....454.......72-79...2 or 4 bolt, some "CE" replacement blocks had four bolt main caps
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Just sitting here contemplating contemplation. |
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04-08-2004, 10:37 PM
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#32 |
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Registered User
Join Date: Mar 2003
Location: Lincoln, NE
Posts: 32
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Just wanted to say hang in there on the rock, I did a year over in Iwakuni in 96-97, it sure is a pain but years later it will be fun to say "well, when I lived in Japan ...". I did get to go to Okinowa(spelling?) for a month and it sure was pretty, but its easy for me to say that I was only there for a month.
Good Luck & Semper Fi
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