68 1200c 3/4/ engine id?????????
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Michael Mayben
IHPA Tech Moderator - Retired & No Longer Online
In this thread:
http://www.forums.IHPartsAmerica.com/gas-engine-tech/5354-anyone-help-me-68-1200c.html
I described where to look for the stamped numbers on the machined pad on the block. I also said the casting numbers really don't mean anything as regards what you are looking for.
Obviously you have not found the machined pad with the serialization stamped into it.
This shot shows a typical identification pad. This is a 345a engine I'm tearing down for a rebuild right now, serial number is obvious. The rough machine marks left by the flycutter are purposeful...that is so that if the engine number is ever machined away (say the vehicle/engine was stolen) for some sort of alteration, we would know that it had been altered unless someone took the time to reproduce the tool marks and re-stamp the numbers using the exact same font that ihc used at the production point.
Racing engine builders that build typical "cheater" engines for circle track racing, etc. Counterfeit the various stamp fonts and tool marks used on "legal" replacement engine blocks so they will attempt to pass through technical inspections that do not require a complete teardown and measurement process.
If by some chance your block machined pad has no numbers stamped in, then either at some point the numbers were removed in a machining process, or the block itself was a service part replacement (bare block) and May have had no serialization stamped into it.
http://www.forums.IHPartsAmerica.com/gas-engine-tech/5354-anyone-help-me-68-1200c.html
I described where to look for the stamped numbers on the machined pad on the block. I also said the casting numbers really don't mean anything as regards what you are looking for.
Obviously you have not found the machined pad with the serialization stamped into it.
This shot shows a typical identification pad. This is a 345a engine I'm tearing down for a rebuild right now, serial number is obvious. The rough machine marks left by the flycutter are purposeful...that is so that if the engine number is ever machined away (say the vehicle/engine was stolen) for some sort of alteration, we would know that it had been altered unless someone took the time to reproduce the tool marks and re-stamp the numbers using the exact same font that ihc used at the production point.
Racing engine builders that build typical "cheater" engines for circle track racing, etc. Counterfeit the various stamp fonts and tool marks used on "legal" replacement engine blocks so they will attempt to pass through technical inspections that do not require a complete teardown and measurement process.
If by some chance your block machined pad has no numbers stamped in, then either at some point the numbers were removed in a machining process, or the block itself was a service part replacement (bare block) and May have had no serialization stamped into it.
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Re: 68 1200c 3/4/ engine id?? dont think you understand my question
How do you figure out which engine it is cause the serial number does not say what cubic inch it is, I'm not stupid, please dont make assumptions, im trying my best to figure this out!! Do I need to just pull the heads and measure the bore? Cause I was told that the 266 304 345 an 392 are near identical, if there is a site that will tell me the meaning these serial #'s then if anyone knows, let me know, thank u once again
How do you figure out which engine it is cause the serial number does not say what cubic inch it is, I'm not stupid, please dont make assumptions, im trying my best to figure this out!! Do I need to just pull the heads and measure the bore? Cause I was told that the 266 304 345 an 392 are near identical, if there is a site that will tell me the meaning these serial #'s then if anyone knows, let me know, thank u once again
Re: 68 1200c 3/4/ engine id?? dont think you understand my question
The serial number means nothing -- other than it is the serial number of the engine in the vehicle.
As far as I know all sv v8 engines have a different serial number sequence for each displacement.
Put on your reading glasses / increase the picture size / screw your eyeballs into focus and
you will see v-345a stamped above the serial number.
266 / 304 will be in the same place - doubtful it is a 392 unless the engine has been swapped.
how do you figure out which engine it is cause the serial number does not say what cubic inch it is, I'm not stupid, please dont make assumptions, im trying my best to figure this out!! Do I need to just pull the heads and measure the bore? Cause I was told that the 266 304 345 an 392 are near identical, if there is a site that will tell me the meaning these serial #'s then if anyone knows, let me know, thank u once again
The serial number means nothing -- other than it is the serial number of the engine in the vehicle.
As far as I know all sv v8 engines have a different serial number sequence for each displacement.
Put on your reading glasses / increase the picture size / screw your eyeballs into focus and
you will see v-345a stamped above the serial number.
266 / 304 will be in the same place - doubtful it is a 392 unless the engine has been swapped.
Michael Mayben
IHPA Tech Moderator - Retired & No Longer Online
In the picture I posted, can't you see the "engine size" stamped right above the serial number???
It's read as "345a". That indicates it'sa 345ci displacement series and the "a" suffix tells us that it's a later generation version than the original 345. Typical numbers would be, 266, 304, 304e, 345, 345a, 392, etc.
The serial number is just that...a serial number in consecutive sequence as the short blocks came off the transfer line during the initial engine assembly phase. Other wise the individual serial number has no significance.
The 266 and 304 blocks have the same deck height. Those are shorter than a 345/392 which also share their own deck height.
It is a very common misconception/urban myth that these sv engines are "all the same". There were many changes made in design and execution over the production run of both "sizes" of these engines over the production run that spanned nearly 30 years. Yes, they share many components, but there are huge differences also over the life span of those motors.
Again, the cubic inch displacement is stamped on that same pad as the serial number. Clean the pad really well, and use a mirror and flashlight to read it.
It's read as "345a". That indicates it'sa 345ci displacement series and the "a" suffix tells us that it's a later generation version than the original 345. Typical numbers would be, 266, 304, 304e, 345, 345a, 392, etc.
The serial number is just that...a serial number in consecutive sequence as the short blocks came off the transfer line during the initial engine assembly phase. Other wise the individual serial number has no significance.
The 266 and 304 blocks have the same deck height. Those are shorter than a 345/392 which also share their own deck height.
It is a very common misconception/urban myth that these sv engines are "all the same". There were many changes made in design and execution over the production run of both "sizes" of these engines over the production run that spanned nearly 30 years. Yes, they share many components, but there are huge differences also over the life span of those motors.
Again, the cubic inch displacement is stamped on that same pad as the serial number. Clean the pad really well, and use a mirror and flashlight to read it.
