Stamp on 455 block

Has anyone seen something like this before. Beteeen the 5 and 7 cylinders. Two Xs and a 030.

 

could it be the relief grinding of .030 that had to be performed between the X's?

 

Hmmm, I'm not familiar with that.

 

030 looks like the date code portion of the engine production code, the two letters might still be hidden. Similar picture attached.

 

The two X characters are stamped during assembly, and aid the assembler with selecting correct parts to maintain clearances within specified limits. Many different characters were used.

The "030" is the production code, and was stamped in conjunction with the application code, which is two letters, upon final assembly of the short block. Some additional cleaning of your deck surface should reveal the other two letters. Some can be difficult to read.

 

Yeah, use some fine grit sand paper like 180 to 200 grit and lightly sand the area to see if the markings show through. Or even some scotch brite would help as well.


Derek

 

You can use the same fluid used to reveal the numbers for modified firearm serial numbers.

 

Thanks guys. I sanded it nice and clean with 220. Still absolutely nothing.
Here's between 5 and 7.

 

And between 1 and 3

 

Looks like it is the very rare number 7 experimental block!

I hate how they did that crappy job from the Buick factory stamping the ID code on their blocks!

Either your block was decked a hundred years ago and someone got bored with a stamp set sitting there or they didn't do a good job stamping it from the factory?


Derek

 

Yes, it's the super secret sleeper code from the stage 3 project I believe. It was so secret that they had to delete a letter.


Must have been made on Friday or Monday. The letters that are there are very clear and deep.

 

I think I figured out one of the past issues with this engine. Between the 3 and 5.

 

Found a stamped number on the block under the drivers side head. It's all confusing after the first digit, a 4, which is for Buick. 41X115998.

Must be secret project Stage 3.....

 

Thanks, yet this does not add up to me. It doesnt follow the vin order.
It didn't match up with a site I went to for info. I thought this was supposed to be a vin number in this location?

http://www.tpocr.com/buickvin6.html

 

Thank you, that makes a lot more sense.

 

Interesting all my 71 blocks were stamped on the front of the block.

 

Shhhhhhhhh.......yerletting out all the secret sleeper codes
Deep under ground in a dusty forgotten Research & Develpoment Lab I have a dedicated group of elderly engineers that have not been told that the big block musclecar wars are over!
I just lower them down canteens of water & Ramen Noodles along with old Hot Rod magazines with the date removed and they keep working!

 

The last six alway matched the VIN on what I took them from.