Identify differential?
Thread Starter
Racer
Joined: Nov 2006
Posts: 379
Likes: 7
Identify differential?
Can anybody help me identify my rear axle/differential? I have been looking on the internet but have not been able to find anything.
I found the following data on it:
2 AZ 11 8 67W
I found the following data on it:
2 AZ 11 8 67W
Last edited by Ronaldo; May 17, 2007 at 08:37 AM.
Account disabled by user request 5 Jan 09
Joined: Jan 2005
Posts: 261
Likes: 1
AZ=3.55 heavy duty(big block) positraction
11 8 67 - sure there isn't another number there?
Month was a 2 digit number, so January would be '01' etc
Day had a 2 digit also ... sometimes.
January 18, 1967 ?? ... for a 1967 Corvette
November 8, 1967 ?? ... for a 1968 Corvette
(Both '67 and '68 Corvette used the same AZ 3.55HD code)
I suspect, if they're spaced as you indicated, it is the Nov 8 date.
W=Warren Michigan assembly plant
Thread Starter
Racer
Joined: Nov 2006
Posts: 379
Likes: 7
thanks for the quick answers both of you 
hmm my car was assembled in november '67, can this differential be the car's original?
I have a not original 327 cui with a fake big block restamp number on it, in my car now.
Are there other ways to check if my car was originally a big block?
hmm my car was assembled in november '67, can this differential be the car's original?
I have a not original 327 cui with a fake big block restamp number on it, in my car now.
Are there other ways to check if my car was originally a big block?
Last edited by Ronaldo; May 17, 2007 at 12:17 PM.
Account disabled by user request 5 Jan 09
Joined: Jan 2005
Posts: 261
Likes: 1
thanks for the quick answers both of you ... hmm my car was assembled in november '67, can this differential be the car's original? I have a not original 327 cui with a fake big block restamp number on it, in my car now.
Are there other ways to check if my car was originally a big block?
Are there other ways to check if my car was originally a big block?
The date coincides with a later November build (my original rear has a date 2 weeks before the car build date)
The AZ code (3.55 heavy duty big block positraction) was used for 1965-66-67-68 & 69.
To check if the car was a big block .... ???
what is the tach red line?
is there a rear sway bar??
out of curiosity, what is the fake restamp number??
Account disabled by user request 5 Jan 09
Joined: Jan 2005
Posts: 261
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In 1968, the big block tach readings were:
427/390 and 427/400hp = 5600rpm
427/435 and 427/430hp = 6500rpm
no return fuel line would indicate a Holley carb, which was the 400, 435 and 400hp versions (427/390 used a Quadrajet).
looks like you have some investigating to do .... good luck.
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Thread Starter
Racer
Joined: Nov 2006
Posts: 379
Likes: 7
The stamp pad sure is a mess ...
In 1968, the big block tach readings were:
427/390 and 427/400hp = 5600rpm
427/435 and 427/430hp = 6500rpm
no return fuel line would indicate a Holley carb, which was the 400, 435 and 400hp versions (427/390 used a Quadrajet).
looks like you have some investigating to do .... good luck.
In 1968, the big block tach readings were:
427/390 and 427/400hp = 5600rpm
427/435 and 427/430hp = 6500rpm
no return fuel line would indicate a Holley carb, which was the 400, 435 and 400hp versions (427/390 used a Quadrajet).
looks like you have some investigating to do .... good luck.
Le Mans Master
Joined: Jan 2000
Posts: 8,918
Likes: 27
From: New Hill NC
Yes, there's a very good chance it is original to the car ...
The date coincides with a later November build (my original rear has a date 2 weeks before the car build date)
The AZ code (3.55 heavy duty big block positraction) was used for 1965-66-67-68 & 69.
To check if the car was a big block .... ???
what is the tach red line?
is there a rear sway bar??
out of curiosity, what is the fake restamp number??
The date coincides with a later November build (my original rear has a date 2 weeks before the car build date)
The AZ code (3.55 heavy duty big block positraction) was used for 1965-66-67-68 & 69.
To check if the car was a big block .... ???
what is the tach red line?
is there a rear sway bar??
out of curiosity, what is the fake restamp number??
