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Question about a 1973 Pontiac 400 Engine Numbers

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I’m trying to figure out this engine number 

I was told it’s a 73 Pontiac 400 engine but having hard time decoding it 


this is the number on the passenger side front engine block right below the head 


282108 YE 



If there’s anything else I can look at just let me know 



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Hey Paul, that number doesn't show up on the list of block numbers that I have. Not saying that one of the others guys cant run that one. On my 68 engine the block numbers are located on the top, back of the block right behind the passenger side head and the date code is by the oil plug on the distributor pad.


That's a 68-69 400ci



Edited by Wrongway
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Ok so I came up with stamped in the back of the block  M226 where the date code shows in your picture 

i could not find any other number

the heads are stamped GM-1 ? Any info 

So looking online is this a December 22 1966 engine? Going off M226

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Since I don't see a 400ci listed in 66 id say its most likely a 76. Here's one of the lists that I look at. Hope it helps bro.



Not sure how clear that came out on your end Paul, but I can email it to you if you'd like.

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