A friend purchased a block with the date code casted D 22 9. The stamp is T0528CCR. The vin stamp is 10L130342. Is this a little early for a LS-6? This has been in a High School shop class for many years and does not appear to be restamped.

Well Dave, I'm certainly not a 1970 expert, but will add a comment or two.

According to engine codes noted here on TC the CCR does not refer to an LS6 code. Those are shown as CRR, CRS & CRV.

If the '9' in D-22-9 refers to 1969, that is way too early for an LS6 as that date is April 22, 1969. I believe the LS6's started near the end of the 1969 calendar year.

Also, I don't believe the "three digit" engine code came into effect until about Late June of 1969 which is also confusing given the D-22-9 date.

Maybe a 70's guru can add some more input as this is only my two cents worth.

D-22-9 is a April 1969 casting..no 454's at that time, only 427's. Some early LS-5's were cast in Oct-Nov-Dec. of 69 but not sure of LS-6 castings. Both LS-5 and LS-6 used a "512" block in 2 and 4 bolt configuration. What is the casting number of the block? That should clear things up alot. I agree with Don, CCR is not a LS-6 code.


ALbert

CCR is a great Rock & Roll band, but not a 1970 engine code :D

The only way any of this might make sense is if the cast date is really D 22 0 instead of D 22 9.

From the info you have provided,10L130342-Which stands for:
1=Chevolet
0=Model year 1970
L=Calif. Van Nuys Plant
130342=last 6 digis of the cars Vin.
According to 1970 Van Nuys records,Car #130342 was produced in October 1969.Which seems very late for the casting date and Tona date you posted,If indeed a Chevelle.
I do not find any CCR suffix from 1970-1975.
As others have suggested,can you recheck all this info again?
Rick

D 22 9 = April 22, 1979
T0528CCR = May 28
is 10L130342 - Oct 1969 car

The time from the assembly date to the car date are longer than normal. Normal time would be a few days to several weeks. While its not impossible, it not normal for it to be 5 months that an engine would sit before being used as these engines were produced for orders vehicles. 1969 production ending in July of 69 and 1970 started up in August. So something is unusual with the engine dates and the the VIN stamp.

Assuming you might have misread the CCR and it might really be CGR? That would be a 1970 400-265 HP Impala engine but I can't tell if its a big block or small block 400. Chevy got real confusing with some models by calling the 402 a 400 in some models and also having a 400 small block in the same models.

I would say, double and triple check the your codes and see if something is not right. Get the casting number from the rear of the block that was near the casting date.

The casting number is 3963512. The date code is D229 and the vin is 10L030342. It does say CRR

Dave, according to Mortec.com (http://www.mortec.com) the 512 block was both 427 and 454 configurations. Given the accuracy of your D229 casting date, it seems this block was originally used for a 427. The CRR code seems out of whack and it, along with the car serial number, might have been a restamp?????

Just an additional couple of pennies worth.

Somethin's still fishy :rolleyes:

Dave, Where exactly is the date code on the block located???

I have a #512 CRV, late Sept.69 cast dated block with a late Mar. 70 assembly date. It appears GM didn't practice FIFO.

I would tend to agree that an April 69 cast with a May dated, assembled engine would be a 427.

Mine is Nov 69 car built 2 week a January

i can share a little knowledge that might help this matter, i have had 2 different 512 blocks both were 4 bolt. one a 69 dated which i beleive to have been a 427 had a high tower in the lifter valley that almost came up to the height of where the end seals are for the intake manifold for the distributor housing to pass thru (best i can describe it without a picture) and the other block was a 70 454 and the area was low cast only as high as the lifter bores basically like what your used to seeing on the later big blocks. if he can look down the distributor hole or has the intake off should shed some lite on what he really has there.
see pages 118 and 129 of the "how to hot rod big block chevy" book, we all have one of those still :cool:

LS-6, the date code is casted in the block at the back where the bell housing would bolt up. For sure a D229 date. The vin is stamped by the oil filter boss. The CRR could have been messed with but the vin number for sure has not been messed with. Still quite a bit of time between cast date and Vin date.

It could be a possibility that a D229 block was used as an Ls6 Block from the factory. The problem nowadays is everyone builds cars with dates they THINK are the best matches,and pretty soon every built car will have a casting date 6 weeks prior to thier build dates.[the generally accepted lead time from block casting to build date]...I have requests for engine blocks where guys count back 6 weeks from thier build dates and want that date[they wont take a block 2 days off from the 6 weeks ,its really ridiculous]and this does not reflect the way gm did things 30 years ago.

In response to TriplblackL78:
i can share a little knowledge that might help this matter, i have had 2 different 512 blocks both were 4 bolt. one a 69 dated which i beleive to have been a 427 had a high tower in the lifter valley that almost came up to the height of where the end seals are for the intake manifold for the distributor housing to pass thru (best i can describe it without a picture) and the other block was a 70 454 and the area was low cast only as high as the lifter bores basically like what your used to seeing on the later big blocks. if he can look down the distributor hole or has the intake off should shed some lite on what he really has there. I have the following info to add: I have two 1969 L71 427 '512 blocks out of 1969 Corvettes T1120LR I-2-9 and the other T1001LR C-1-9 which are the low cast type you speak of. Where the 427 3963512 4.25" bore block was a mid year change from 3935439 and 3955270 blocks for the Corvette I'd have to say The C-1-9 was a very early '512 piece.