block ID help - Chevelle Tech
Tag Team De-coding cowl tags and vin numbers.

 
LinkBack Thread Tools Search this Thread Display Modes
post #1 of 6 (permalink) Old Jan 5th, 04, 6:37 PM Thread Starter
Tech Team
 
Join Date: Feb 2003
Location: Burlington, NC
Posts: 732
Send a message via AIM to jhunt
Post

i'm in the process of building a 454 but was looking at keeping the original block since it is suppose to be a #s matching block and found a crack in one of the journals. so before i attempt to fix it i would like to know if it is real. the only #s we found were 3855961.it is a 66 ss. thanks for your help
john h.

John H
66 SS
498ci, 2 bolt main, 4 speed Muncie-21, Comp cam hyd roller. Duration @ .050 Intake 248/Exhaust 258. Intake 613/613 exh on 114 lobe separation, Dart dual plane manifold,Edl. 100cc heads, 950 HP carb,MSD 6-al.


To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.


To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.
jhunt is offline  
Sponsored Links
Advertisement
 
post #2 of 6 (permalink) Old Jan 5th, 04, 8:09 PM
Lifetime Premium Member
Rocky Hill
 
Join Date: Oct 2000
Location: SW Missouri
Posts: 5,655
Post

It appears to be the casting numbers for a 66-67 325hp 396 2 bolt main block.


Rocky

A Man And His Chevelle!
It's A Beautiful Thing.

TC Member #1530

To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.


To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.


To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.



To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.
rocks66ss is offline  
post #3 of 6 (permalink) Old Jan 6th, 04, 12:20 AM Thread Starter
Tech Team
 
Join Date: Feb 2003
Location: Burlington, NC
Posts: 732
Send a message via AIM to jhunt
Post

thanks but how can i tell if it is an original block if i don't see any other #s on it or, should there be more casting #s? I was told at the time of purchase that it was original and the 360 hp engine. is there any other way to tell?
john h.

John H
66 SS
498ci, 2 bolt main, 4 speed Muncie-21, Comp cam hyd roller. Duration @ .050 Intake 248/Exhaust 258. Intake 613/613 exh on 114 lobe separation, Dart dual plane manifold,Edl. 100cc heads, 950 HP carb,MSD 6-al.


To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.


To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.
jhunt is offline  
 
post #4 of 6 (permalink) Old Jan 6th, 04, 12:38 AM
Lifetime Premium Member
Bruce
 
Join Date: Nov 2002
Location: Glendale, AZ
Posts: 3,010
Post

John,

The 3855961 block is correct for 325HP and 360HP (360HP also used 3855962) 66 Chevelle and El Camino 396 engines. They were also used on 1965 and 1966 325HP full size Chevrolets.

All Chevelle engines have an assembly code and suffix such as T1207EM which indicates the date of assembly with a 2 or 3 letter suffix code indicating configuration (horsepower, transmission). This code is stamped on the passenger side front of the deck surface. There is also a partial VIN such as 6FXXXXXX, where the letter represents the assembly plant and the Xs represent the the last six digits of the vehicle identification number. This partial VIN is stamped at the vehicle assembly plant and should match your car. If the partial VIN matches your car then this is probably the original engine. If these codes have been milled off during a rebuild, and are now non-existent, then you are out of luck, although you could still look at the casting date of the block (located on the side close to the starter) to see if the casting date fits with the build date of your car. This might tell you that the block could be the original.

66 El Camino 396/325HP 4-Spd
My Build Thread:
To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.

62 Corvette 327/360HP (original RF engine and Fuel Injection) (future restoration project)
66 Corvair My son's project. Small block, Powerglide, C5 differential and rear suspension
72 Chevelle wagon project
AZCamino is offline  
post #5 of 6 (permalink) Old Jan 6th, 04, 9:14 AM
Gold Founding Member
Dale
 
Join Date: Aug 1998
Location: Lawton, Oklahoma
Posts: 19,864
Post

Quote:
Originally posted by AZCamino:
John,
There is also a partial VIN such as 6FXXXXXX, where the letter represents the assembly plant and the Xs represent the the last six digits of the vehicle identification number. This partial VIN is stamped at the vehicle assembly plant and should match your car.
I thought the stamping of the VIN wasn't mandated by law until 68 or 69 and some plants stamped the VIN and some didn't before that. In any event, it should have the engine ID code as mentioned unless it's been decked.

TC Gold #92 ~ August 1998
*
To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.

*
To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.

* Build Sheet Data Collection
* Author:
To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.


To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.


To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.


To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.


To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.
DaleM is offline  
post #6 of 6 (permalink) Old Jan 6th, 04, 10:37 AM
Lifetime Premium Member
Bruce
 
Join Date: Nov 2002
Location: Glendale, AZ
Posts: 3,010
Post

Dale,

I'm not sure about the legal requirements, but it was at least GM policy to stamp the partial VIN in passenger cars. All of the 1965 and 1966 passenger car 961 blocks I've seen have the vehicle numbers stamped in them.

Now trucks are different story, and El Caminos were considered trucks. It is my understanding that trucks were exempt from this requirement. I heard that El Caminos built at Fremont, which also built trucks, may or may not have the VIN sequential stamped in their blocks. I know of one Fremont 66 El Camino with a EM coded big block that is not stamped with the VIN.

What did start in 1968 was the requirement to stamp service replacement parts with serial numbers. This was the beginning of the CE coded replacement engines that are now seen.

66 El Camino 396/325HP 4-Spd
My Build Thread:
To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.

62 Corvette 327/360HP (original RF engine and Fuel Injection) (future restoration project)
66 Corvair My son's project. Small block, Powerglide, C5 differential and rear suspension
72 Chevelle wagon project
AZCamino is offline  
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Chevelle Tech forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address. Note, you will be sent a confirmation request to this address.

Email Address:
OR

Log-in









Old Thread Warning
This Thread is more than 5822 days old. It is very likely that it does not need any further discussion and thus bumping it serves no purpose.
If you still feel it is necessary to make a new reply, you can still do so though.

Thread Tools Search this Thread
Show Printable Version Show Printable Version
Email this Page Email this Page
Search this Thread:

Advanced Search
Display Modes
Linear Mode Linear Mode



Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome