Hi there
my first thread at this forum.

I have 68 convertible with 327 and a 4 speed manual.
I'm about to restore the car with a complete body of restoration.
However, I have a slight problem in identifying the engine.
The stamped serial number is CE942156
The engine casting number is 3959512
However, the cylinder heads casting number is 3876487.
According informations that I found on the net, the combustion chamber volume is 76CC for the heads, which makes me beleive that the compression ratio is way too low for this engine.
Any idea how these heads ended up on this engine, and what to do with them?

Any comments appreciated.
Lars

 

That's a 62 - 63 327 engine. 250 hp.

 

If I understand it correctly, the CE stamped together with the serial number means that its a warranty replacement engine.
Seems as this engine is a bit of a bastard!

 

Not sure why they would have put a block from the early 60's in as a warrenty replacement. It might of been a 62-63 warrenty block from another car. The last three digits on the block should be 678.

 

Welcome to the forum.
Nice to have another 68 owner in the group.
Kurt
68 L79 Coupe 4speed

 

CE is Chevrolet Engine

9, the first digit, is usually the year.

The rest of the numbers are just a sequence for warranty or over the counter replacement engines.

So, it's a warranty or replacement engine from 1969.

Chuck

 

From Mortec.

3959512....327...62-67...2...Was also used for some "CE" replacement blocks

What's the casting date on the back of the block, to the right of the distributor on the bellhousing flange?

Chuck

 

It's a warranty or over the counter replacement. This might not be the first car it was installed on. The dates work so it could be for this vehicle.

-Mark.

 

That's wild that they would have installed a small journel block in later model car. Interesting info here.

 

All, thanks for your valued input.

The date casting number is K 148. Seems as it is a 68 block!
Anyone knows how these never cylinder heads affect the overall compression ratio?
Wonder if it becomes lower!
When compressions were lowered in the beginning of the 70's, was that by larger combustion chambers in the heads, or by pistons with lower deck height?

Thanks
Lars

 

depends on the pistons it has in it. if they changed out heads they may have put in different pistons at the same time. and to answer your question, i think most of the lower compression engines used open chamber heads.