2024 Canadian Poncho Calendars are Now Available! CLICK HERE

 

 

Members Login
Username 
 
Password 
    Remember Me  
Post Info TOPIC: Decoding a Small Block Chevy 400


Member

Status: Offline
Posts: 20
Date:
Decoding a Small Block Chevy 400


Hi Everyone, 

 

I have a 72 LeMans with a 400 small block Chevy in it, which isn't original to the car. I have been trying to decode the engine with the numbers I found on the block. The numbers are as follows: T0123CSU, 330817, and 261702197. Thanks for the help greatly appreciated.



__________________


Guru

Status: Offline
Posts: 634
Date:

musicman6120 wrote:

Hi Everyone, 

 

I have a 72 LeMans with a 400 small block Chevy in it, which isn't original to the car. I have been trying to decode the engine with the numbers I found on the block. The numbers are as follows: T0123CSU, 330817, and 261702197. Thanks for the help greatly appreciated.


 According to the casting# it is a 400 out of a 1976 passenger Oshawa built, I do not find a CSU code though, here are the numbers I have.

CSU.JPG



Attachments
__________________

1967 Beaumont Custom

Canadian Poncho Supporting Member



Uber Guru

Status: Offline
Posts: 3630
Date:

CSU1974400t350U LT41754Chevelle
CSU1974400t400 NB2U LT41752full size

 

T0123CSU

Tonawanda, January 23rd.



-- Edited by 67Poncho on Monday 13th of March 2017 04:24:56 PM

__________________

Vincent Jr.



Member

Status: Offline
Posts: 20
Date:

Thanks for the inf!



__________________


A Poncho Legend!

Status: Offline
Posts: 20051
Date:

Given it is a 1974, it is possible it was harvested from a Canadian Pontiac B Wagon, that was the only useage of a 400 sbc in an Oshawa Pontiac that year I believe. The Chevrolet B wagons and cars also used the 400 small block I believe. 



__________________

Ray White, Toronto ON

1973 LeMans 454 "Astro-Jet"

Built March 9, 1973 - Oshawa ON

1993 Corvette Convertible LT 1

Built January 10, 1993 - Bowling Green Kentucky 

 




Member

Status: Offline
Posts: 20
Date:

Thanks for all the great info. The guy that I purchased the car off of told me it was a 350 small block Chevy, but something didn't look right when I looked at the harmonic balancer and the flywheel. After some research I found out it was a 400 small block, just wasn't sure what it came out of. Plus it was backed by a TH350 which when I sent away for the build sheet of the car from GM Canada, it showed the car came with a 400 V8 4 bbl which I assumed was a Pontiac block, and it would have been mated to a TH400 with 3.73 twelve bolt rear end. Not sure what happened to the original motor and trans since the previous owner bought it out west some where, from the original guy that restored it. I had the rear end rebuilt this past summer and had 3.42 gears, because even the rear end gears weren't original, i think they had 2.50 gears in it and it was an open diff. It has a posi rear end now.

__________________


A Poncho Legend!

Status: Offline
Posts: 20051
Date:

Here is the 1972 Canadian LeMans Owners Manual page with engines. Orange = Chevrolet  Blue = Pontiac

The 1974 400 small block 4bbl was rated at 180 HP (net) & 290 lb-ft (net)

72LeMansGTOengines.jpg



__________________

Ray White, Toronto ON

1973 LeMans 454 "Astro-Jet"

Built March 9, 1973 - Oshawa ON

1993 Corvette Convertible LT 1

Built January 10, 1993 - Bowling Green Kentucky 

 




Canadian Poncho Superstar!

Status: Offline
Posts: 4505
Date:

It must be from a 1974 Chevrolet full-size wagon, or possibly a Laurentian or Canadian Catalina Safari. The Chevy was upgraded to the 400 4-barrel LT4 as the base engine for 74, ditto for the Canadian Safaris.

Normally the 400 4-barrel in 74 was exclusive to California, except for the fullsize wagons where 49 states & Canada they ran them without a smog pump. All of them ran the TH400 trans.

Last car use was 76, last truck use was 1980. Good 400 cores are scarce today.



__________________

67 Chevelle Malibu Sport Coupe, Oshawa-built 250 PG never disturbed.

In garage, 296 cid inline six & TH350...

Cam, Toronto.


I don't judge a man by how far he's fallen, but by how far back he bounces - Patton



Member

Status: Offline
Posts: 20
Date:

The partial VIN that was stamped on the block pad was 261702197, is it possible to decode it? I know the Canadian VIN's can be tricky to decipher.

Cheers
Greg

__________________


A Poncho Legend!

Status: Offline
Posts: 20051
Date:

musicman6120 wrote:

The partial VIN that was stamped on the block pad was 261702197, is it possible to decode it? I know the Canadian VIN's can be tricky to decipher.

Cheers
Greg


 You know I'm thinking Gerry had it right at a 1976, Would a full VIN look like this?

XXXX261702197

If right the 6 = 1976 and the 1 = Oshawa, and that is what Gerry initially said above.



__________________

Ray White, Toronto ON

1973 LeMans 454 "Astro-Jet"

Built March 9, 1973 - Oshawa ON

1993 Corvette Convertible LT 1

Built January 10, 1993 - Bowling Green Kentucky 

 


Page 1 of 1  sorted by
 
Quick Reply

Please log in to post quick replies.

Tweet this page Post to Digg Post to Del.icio.us
.
Support Canadian Poncho!
Select Amount:
<
.
.
.