engine and carb date code question
Thread Starter
Drifting
Joined: Jun 2007
Posts: 1,692
Likes: 157
From: Miami, FL
engine and carb date code question
I have a question about a particular engine and carburetor combo:
The Holley carb is date coded 085 (end of August 1970). The engine is date coded 0910CGP indicating a build date of Sept. 10, 1971. The carb has a GM part number and is the correct LIST number for the engine.
Seems odd that the dates line up except for being one year apart. Either this is a strange coincidence or I don't fully understand how to interpret GM date codes.
Do I have it right?
The Holley carb is date coded 085 (end of August 1970). The engine is date coded 0910CGP indicating a build date of Sept. 10, 1971. The carb has a GM part number and is the correct LIST number for the engine.
Seems odd that the dates line up except for being one year apart. Either this is a strange coincidence or I don't fully understand how to interpret GM date codes.
Do I have it right?
Race Director
Joined: Jun 2005
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2018 Corvette of Year Finalist
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FYI from the NCRS judging guide..........
pg.53 "In the first three to five days of 1970 production, an alternate location was for the serial number derivative. This number is above the oil filter on the side of the case just in front of the bellhousing."
Just a follow up to our conversation, I knew that I had read that before!
pg.53 "In the first three to five days of 1970 production, an alternate location was for the serial number derivative. This number is above the oil filter on the side of the case just in front of the bellhousing."
Just a follow up to our conversation, I knew that I had read that before!
Thread Starter
Drifting
Joined: Jun 2007
Posts: 1,692
Likes: 157
From: Miami, FL
Thanks WB... turned out that engine was a 73 casting and heads. There was a CE stamp on the pad. The guy really wasn't up front about the VIN. I didn't see any numbers on the alternate pad at all.
I'm back to looking hard at the 71 in original paint. I now have pics of the engine stamp and it's out of a Z28. At least it is the correct year and engine, so I'm still interested. This is where my carb/engine code question comes in.
I'm back to looking hard at the 71 in original paint. I now have pics of the engine stamp and it's out of a Z28. At least it is the correct year and engine, so I'm still interested. This is where my carb/engine code question comes in.
Thread Starter
Drifting
Joined: Jun 2007
Posts: 1,692
Likes: 157
From: Miami, FL
I have a question about a particular engine and carburetor combo:
The Holley carb is date coded 085 (end of August 1970). The engine is date coded 0910CGP indicating a build date of Sept. 10, 1971. The carb has a GM part number and is the correct LIST number for the engine.
Seems odd that the dates line up except for being one year apart. Either this is a strange coincidence or I don't fully understand how to interpret GM date codes.
Do I have it right?
The Holley carb is date coded 085 (end of August 1970). The engine is date coded 0910CGP indicating a build date of Sept. 10, 1971. The carb has a GM part number and is the correct LIST number for the engine.
Seems odd that the dates line up except for being one year apart. Either this is a strange coincidence or I don't fully understand how to interpret GM date codes.
Do I have it right?
Thanks,
Race Director
Joined: Jul 2001
Posts: 15,892
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In any case, 0910 means September 10th, but does not indicate any year. You would normally need the casting date from the block to give the earliest year that the engine could have been built.
CGP was used only once- 1971 Z28 as mentioned above- so this eliminates any possible Corvette use.
Thread Starter
Drifting
Joined: Jun 2007
Posts: 1,692
Likes: 157
From: Miami, FL
Thanks, guys. At least I know the carb goes with the engine, and the engine is consistent with what was originally shipped in the Corvette.
For a non-matching number Corvette, this is pretty darn close to the correct engine. I think I'm beginning to convince myself the matching number requirement is not as critical to my goal of having an "authentic" vehicle.
For a non-matching number Corvette, this is pretty darn close to the correct engine. I think I'm beginning to convince myself the matching number requirement is not as critical to my goal of having an "authentic" vehicle.
Thread Starter
Drifting
Joined: Jun 2007
Posts: 1,692
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From: Miami, FL
Sorry Mike, I've been looking at a 71 LT1 corvette from a distance away. I recently received pictures of the engine pad which revealed it is not the original engine. It is the correct engine but was taken from a 1971 Z28. The fact that it is still a 1971 LT1 engine having all the right specs is keeping my interest. Finding a decent driver in original condition is becoming very difficult. I guess I am lowering my standards.
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Melting Slicks
Joined: Nov 2004
Posts: 2,672
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From: Nevada City California
Mike,
I'm believe gccch is just trying to justify that the '71 LT-1 Corvette he is interested in, that doesn't have its original high performance engine anymore, at least has what most of us would consider the next best thing, an original high performance engine from a '71 Z-28, which for the most part does consist of the same special parts, except for special TI system, high performance exhaust manifold design & special high performance air cleaner housing.
I'm believe gccch is just trying to justify that the '71 LT-1 Corvette he is interested in, that doesn't have its original high performance engine anymore, at least has what most of us would consider the next best thing, an original high performance engine from a '71 Z-28, which for the most part does consist of the same special parts, except for special TI system, high performance exhaust manifold design & special high performance air cleaner housing.
Thread Starter
Drifting
Joined: Jun 2007
Posts: 1,692
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From: Miami, FL
Mike,
I'm believe gccch is just trying to justify that the '71 LT-1 Corvette he is interested in, that doesn't have its original high performance engine anymore, at least has what most of us would consider the next best thing, an original high performance engine from a '71 Z-28, which for the most part does consist of the same special parts, except for special TI system, high performance exhaust manifold design & special high performance air cleaner housing.
I'm believe gccch is just trying to justify that the '71 LT-1 Corvette he is interested in, that doesn't have its original high performance engine anymore, at least has what most of us would consider the next best thing, an original high performance engine from a '71 Z-28, which for the most part does consist of the same special parts, except for special TI system, high performance exhaust manifold design & special high performance air cleaner housing.
Thanks, early shark.
Race Director
Joined: Jul 2001
Posts: 15,892
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Mike,
I'm believe gccch is just trying to justify that the '71 LT-1 Corvette he is interested in, that doesn't have its original high performance engine anymore, at least has what most of us would consider the next best thing, an original high performance engine from a '71 Z-28, which for the most part does consist of the same special parts, except for special TI system, high performance exhaust manifold design & special high performance air cleaner housing.
I'm believe gccch is just trying to justify that the '71 LT-1 Corvette he is interested in, that doesn't have its original high performance engine anymore, at least has what most of us would consider the next best thing, an original high performance engine from a '71 Z-28, which for the most part does consist of the same special parts, except for special TI system, high performance exhaust manifold design & special high performance air cleaner housing.
Race Director
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2018 Corvette of Year Finalist
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Greg, Be patient, your looking for an LT 1 and yours is out there. With winter coming you would'nt get much time on the road this season anyway, so maybe spend the next several months looking?
My .02 WB
My .02 WB
Last edited by Don Rickles; Oct 31, 2007 at 07:56 PM.
Thread Starter
Drifting
Joined: Jun 2007
Posts: 1,692
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From: Miami, FL
OK, but a zebra is not a horse with stripes. There's a reason that the engine is not still resident in the original Z-28. In my mind, trying to give it false credibilty as an 'almost as good' is not warranted. It's an NOM car, not worth a penny more. Who knows what's inside that engine?
Race Director
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Just because you take an Z-28 engine and substitute Corvette spec LT1 hardware to it doesn't magically make it a real LT1 engine. Adding stripes to a horse doesn't make it a zebra.
I'm not saying it's bad car or engine or a bad deal, just that the fact that the engine started life in a Z28 doesn't really count for much, technically or commercially.
Thread Starter
Drifting
Joined: Jun 2007
Posts: 1,692
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From: Miami, FL
How do you know it's been in the car since 1980? Even if it's true, what difference does that make? It's a non-Corvette engine removed from a Camaro some time in it's past for some unknown reason. Nobody knows what inside it now.
Just because you take an Z-28 engine and substitute Corvette spec LT1 hardware to it doesn't magically make it a real LT1 engine. Adding stripes to a horse doesn't make it a zebra.
I'm not saying it's bad car or engine or a bad deal, just that the fact that the engine started life in a Z28 doesn't really count for much, technically or commercially.
Just because you take an Z-28 engine and substitute Corvette spec LT1 hardware to it doesn't magically make it a real LT1 engine. Adding stripes to a horse doesn't make it a zebra.
I'm not saying it's bad car or engine or a bad deal, just that the fact that the engine started life in a Z28 doesn't really count for much, technically or commercially.
Team Owner
Joined: Sep 2006
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From: Westminster Maryland
I think it's good that you're finding out the facts about this car . You can then make a decision whether this is a car you'll be happy with and what you're willing to pay for it, knowing what it really is. Does it matter to you what the next owner may think or be willing to pay if/when you sell it someday?
Regards,
Alan
Regards,
Alan
Thread Starter
Drifting
Joined: Jun 2007
Posts: 1,692
Likes: 157
From: Miami, FL
I think it's good that you're finding out the facts about this car . You can then make a decision whether this is a car you'll be happy with and what you're willing to pay for it, knowing what it really is. Does it matter to you what the next owner may think or be willing to pay if/when you sell it someday?
Regards,
Alan
Regards,
Alan
