Decoding numbers C1/C2
Thread Starter
Burning Brakes
Joined: Apr 2020
Posts: 962
Likes: 357
Decoding numbers C1/C2
Good morning all,
In the middle of an engine/gear box rebuild and came accross two numbers that I can not translate.
The engine is a 327/350 bored .030 over and had been ballanced many years ago. When I turn the bock over I can clearly see the numbers that the balancer stamped into the block next to each piston/crank location.
Unfortunately when this engine was machined, the machinist ground off the numbers just in front of the passenger side valve cover and they are lost forever so all I have to go on is the casting number on the rear of the engine:
389 2657 which tells me that this block is from a 66 something or other.
At the very back of the engine o the corner of the block is stamped: IO 6 F and while all of the balancing information is very easy to translate, I do not understand this sequence.
The Gear Box is Muncie M-20 all of the numbers make sense except --at the top of the main box are the numbers:
K 195 083
Any insight would be welcome.
Thanks
Eddie
In the middle of an engine/gear box rebuild and came accross two numbers that I can not translate.
The engine is a 327/350 bored .030 over and had been ballanced many years ago. When I turn the bock over I can clearly see the numbers that the balancer stamped into the block next to each piston/crank location.
Unfortunately when this engine was machined, the machinist ground off the numbers just in front of the passenger side valve cover and they are lost forever so all I have to go on is the casting number on the rear of the engine:
389 2657 which tells me that this block is from a 66 something or other.
At the very back of the engine o the corner of the block is stamped: IO 6 F and while all of the balancing information is very easy to translate, I do not understand this sequence.
The Gear Box is Muncie M-20 all of the numbers make sense except --at the top of the main box are the numbers:
K 195 083
Any insight would be welcome.
Thanks
Eddie
Race Director
Joined: May 2006
Posts: 18,695
Likes: 2,572
Concerning the I0 6 F, post a picture that format does not make sense.
Concerning the transmission date codes start with the letter P.
see this thread on the block casting number
https://www.corvetteforum.com/forums...-or-large.html
Concerning the transmission date codes start with the letter P.
see this thread on the block casting number
https://www.corvetteforum.com/forums...-or-large.html
Last edited by MelWff; Jul 6, 2020 at 02:08 PM.
Burning Brakes
Joined: Nov 2004
Posts: 1,076
Likes: 204
From: Ontario
3892657 is a block casting number. It is generally a 1 model year only block. The model year is 1967. There might have been some very late '66's that received this block. But that may be unverified.
You need to supply the block casting date.
Photos of any numbers is the best way to reduce much of the guess work.
You need to supply the block casting date.
Photos of any numbers is the best way to reduce much of the guess work.
Race Director
Joined: Feb 2007
Posts: 15,414
Likes: 8,864
From: northern california
C2 of Year Finalist (track prepared) 2019
Good morning all,
In the middle of an engine/gear box rebuild and came accross two numbers that I can not translate.
The engine is a 327/350 bored .030 over and had been ballanced many years ago. When I turn the bock over I can clearly see the numbers that the balancer stamped into the block next to each piston/crank location.
Unfortunately when this engine was machined, the machinist ground off the numbers just in front of the passenger side valve cover and they are lost forever so all I have to go on is the casting number on the rear of the engine:
389 2657 which tells me that this block is from a 66 something or other.
At the very back of the engine o the corner of the block is stamped: IO 6 F and while all of the balancing information is very easy to translate, I do not understand this sequence.
The Gear Box is Muncie M-20 all of the numbers make sense except --at the top of the main box are the numbers:
K 195 083
Any insight would be welcome.
Thanks
Eddie
In the middle of an engine/gear box rebuild and came accross two numbers that I can not translate.
The engine is a 327/350 bored .030 over and had been ballanced many years ago. When I turn the bock over I can clearly see the numbers that the balancer stamped into the block next to each piston/crank location.
Unfortunately when this engine was machined, the machinist ground off the numbers just in front of the passenger side valve cover and they are lost forever so all I have to go on is the casting number on the rear of the engine:
389 2657 which tells me that this block is from a 66 something or other.
At the very back of the engine o the corner of the block is stamped: IO 6 F and while all of the balancing information is very easy to translate, I do not understand this sequence.
The Gear Box is Muncie M-20 all of the numbers make sense except --at the top of the main box are the numbers:
K 195 083
Any insight would be welcome.
Thanks
Eddie
