[johnta1]

Also, there is probably a partial VIN on the block, down the passenger side next to the timing cover. It will look something like this:

29A1xxxxx with the x's being numbers, The 'A' is the plant so could be a few different letters.

[goat69SD]

Originally Posted by johnta1

Also, there is probably a partial VIN on the block, down the passenger side next to the timing cover. It will look something like this:

29A1xxxxx with the x's being numbers, The 'A' is the plant so could be a few different letters.

I posted a picture where the YD was and there was a number there. Would that be the serial number?

[goat69SD]

Originally Posted by johnta1

Also, there is probably a partial VIN on the block, down the passenger side next to the timing cover. It will look something like this:

29A1xxxxx with the x's being numbers, The 'A' is the plant so could be a few different letters.

I posted a picture where the YD was and there was a number there. Would that be the serial number?It was 0359549

[johnta1]

No, that is called the Engine Unit Number or Motor Unit Number.
I have a database of these that I collect.
The VIN will be down where the timing cover radiator hose connection comes out.

The block code makes the engine a 1968 or 1969 engine block.
The YD is a 1969 block code, with no YD in 1968. The 1967 block would be 9786133 block code.

With the partial VIN it will show what year the block is for. The Plant code from it would possibly show what car it came in. (or not come in)

[Baron Von Zeppelin]

It might be L108 , instead of B017 , if by chance it was viewed upside down.

The date code on your intake manifold is next to thermostat housing.
Same format , might as well check it too

[Baron Von Zeppelin]

On the passenger side - of the front of the block - look all alongside the timing cover for a 9 digit number stamped into the block.
That will be the partial VIN

[goat69SD]

Originally Posted by Baron Von Zeppelin

On the passenger side - of the front of the block - look all alongside the timing cover for a 9 digit number stamped into the block.
That will be the partial VIN

I found the numbers by the timing chain cover. 29X127978 Possibly something like this? 1969 400 YD 9790071 2 Bar Carb 290 Full-Size

[Baron Von Zeppelin]

Yep .
The casting date must actually be L108 - that would be Nov or Dec 10, 1968 (69 model year)
Some years skipped "I" on casting dates , and I don't remember now about 69.

The 2 is for Pontiac
9 is the model year
X is the Plant - X must be a full size car plant . I'm not familiar with it.
A 69 GTO could be ordered with an economy 400 2bbl engine , but this isn't one of those.

Your car would have been a WT code block with 48 heads
As far as design parameters , you have basically the same stuff now.
Plus the big exh. manifolds

[goat69SD]

I personally want to thank PY Forum and its members for all the information and their time in helping me understand some facts about the Pontiac engines. This has been very helpful. Great site I am very impressed.

[goat69SD]

So in Pontiac this is not considered closed chamber? These are #13 heads . Just trying to understand what is what.