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My 79 corvette has this vin# 1Z8749S427000. Block casting# 3970010, Head casting#3878487x. I am getting ready to start my Build and would appreciate knowing what I am starting with. I was told matching # L82 but so much confusing information I hope someone can clear this up. Thanks
You need the VIN derivative, included in the numbers found on the pad in front of your passenger side head, to determine if the numbers “match” on your car.
010 S is in the middle of the block. There are no numbers on the heads except for the ones I posted
and they are between the valves and pushrods. Unless someone went to all the trouble of grinding
them off and repainted the period correct blue((what little remains) there is none. That is why it is so frustrating. The car is badged as an L 82 with aluminum intake Quadra jet four barrel four bolt main an automatic transmission. The car has T tops and came with factory air.
Last edited by Steve Kistler; Sep 20, 2019 at 11:46 AM.
Reason: More information
Right below the passenger side valve cover, in front , will be a squarish pad. It will have a partial vin and the engine information. Like this or is that information gone?
010 S is in the middle of the block. There are no numbers on the heads except for the ones I posted
and they are between the valves and pushrods. Unless someone went to all the trouble of grinding
them off and repainted the period correct blue((what little remains) there is none. That is why it is so frustrating. The car is badged as an L 82 with aluminum intake Quadra jet four barrel four bolt main an automatic transmission. The car has T tops and came with factory air.
If the pad is decked and the info is gone, then even if it was original, it “used to be numbers matching.” Not sure if you are looking at the right spot, though. (See photos above). Earlier blocks have a more oblong shaped pad.
010 blocks are common for these cars (and others) over a number of years. It would be correct in 1979. Can you see the casting date on back of the block?
Last edited by vettebuyer6369; Sep 20, 2019 at 12:53 PM.
From: Loud, Raw and Dangerous 1968 327 4S in Southern California
Front passenger side of the engine.
Here is another picture of my 1968 that might help...front passenger side of the engine block. First prize to anyone that can tell me what the C2N code means...can't find it on any of the lists.
Redvette2
Last edited by Redvette2; Sep 20, 2019 at 01:31 PM.
Right below the passenger side valve cover, in front , will be a squarish pad. It will have a partial vin and the engine information. Like this or is that information gone?
Sorry I misunderstood I kept looking on the heads and there’s nothing on them but this is off the block Sorry I misunderstood I kept looking on the heads and there’s nothing on them but this is off the block
"ZBB" = '79 Corvette L-82 with automatic transmission.
Assembled on March 5th 1979.
If the last few digits of your VIN match the last few digits of the VIN derivative number stamped on that pad (smaller stamping), the engine is original to your car.
Not sure why someone stepped over top of it very hard to read even up close and personal with a magnifying glass I think the numbers are right but if not it is what it is Not sure why someone stepped over top of it very hard to read even up close and personal with a magnifying glass I think the numbers are right but if not it is what it is
Front passenger side of the engine.
Here is another picture of my 1968 that might help...front passenger side of the engine block. First prize to anyone that can tell me what the C2N code means...can't find it on any of the lists.
Redvette2
That small design pad wasn’t found on a 1968, that the later design.
68 blocks had the longer oblong design.
Seems C2M is a ‘77 305, C2N comes up as a Phoenix or something. Looks like an error.
Last edited by vettebuyer6369; Sep 21, 2019 at 03:15 PM.
Front passenger side of the engine.
Here is another picture of my 1968 that might help...front passenger side of the engine block. First prize to anyone that can tell me what the C2N code means...can't find it on any of the lists.
Redvette2
Originally Posted by vettebuyer6369
That small design pad wasn’t found on a 1968, that the later design.
68 blocks had the longer oblong design.
Seems C2M is a ‘77 305, C2N comes up as a Phoenix or something. Looks like an error.
I agree that the pad is not for a 68, it is a later design, maybe late 70s.
Checked all my sources and could not find any listing for C2N.
From: Loud, Raw and Dangerous 1968 327 4S in Southern California
Yes...the engine doesn't look a 1968. Since it has a 2 bolt main, a 3970010 engine block casting number and a passenger side dip stick I am leaning toward it really being a 350. Or a miss-stamped block.
This is as good as l can get it. I have a 4 bolt main and wind age tray. Aluminum heads and Q-jet 4bl. If it is or isn’t has become irrelevant to me as I have no plans to sell it. I will let the kids or grandkids figure it out after I am gone.
Vin#
