1969 chevy cst big block
 

Can anyone tell me if the 1969 Chevrolet CST big block trucks were labeled with the 400 badges? I read that the later models were labeled with the 400 badges and wanted to know if this is the case. Any insight would be greatly appreciated...

Re: 1969 chevy cst big block
 

pretty sure it should have been badged as 396 in 1969.

Re: 1969 chevy cst big block
 

Thanks for the reply... I will keep researching. I heard that the some of the later models in 1969 could of been labeled with 400 fender badges.

Re: 1969 chevy cst big block
 

I believe this is correct...

Re: 1969 chevy cst big block
 

Thanks for the reply...

Re: 1969 chevy cst big block
 

The 402 was introduced in 1970.

GM was developing the SBC 400, but didn't want a SBC with a larger CU, so they punched out the 396 to 402, and slapped on a 400 emblem to test our limits.

Course that wasn't enough, so on some they slapped on the 400 emblem, SPID read 396, and featured a 402 under the hood, and/or any variation of the three. Make sense?

Re: 1969 chevy cst big block
 

Yes it does.. I am buying this truck and am in the process of verifying it has the number matching motor. I have not seen to many at all with the 400 badge but did read on line that they did label some of the later 69 models with the 400 badge. Can't wait to get it bought

Thanks for your reply

Byronl68

1966 shortbed Big Window A/C truck
1961 Chevy K10 Shortbed fleet side
1962 Chevy K10 Shortbed step side

Re: 1969 chevy cst big block
 

From what I read they created those to salvage a flaw in a whole bunch of off the assembly line 396 blocks. They were bored over to avoid them being junked.

Re: 1969 chevy cst big block
 

Makes sense.

Once upon a time, I thought I heard the 396 heads had larger ports and therefore more compression. If I recall, it was 10:1 Vs 8.5/1. The heads on my rebuild came off a 396. Note: I don't know a lot about engines. I just did the R and R, with my buddy who led.

Re: 1969 chevy cst big block
 

Port size doesn't effect compression ratio, that is determined by chamber volume as far as the heads are concerned. But anyhow the 396 -402 trucks are among the coolest IMHO.

Re: 1969 chevy cst big block
 

Always thought the 402 started in 1971?

Re: 1969 chevy cst big block
 

Thanks for all the input. Im excited to get the truck and appreciate your help in verifying it's correct. This truck is pretty cool. Does anyone know the correct engine code for a 1969 400 block and where on the engine I would find the code?

Re: 1969 chevy cst big block
 

Nope, 1970...........

Big-Block Chevy: Block Casting Identification
Casting No.: Designation: Model year: Notes:

3999290 396 '68-'69 two- or four-bolt, truck
3999290 402 '70-'72 two- or four-bolt, truck

Re: 1969 chevy cst big block
 

I see. Thank you.

Re: 1969 chevy cst big block
 

Thanks for the reply....