Block data??

[bob69302]

Hi guys,
Thank you all again for being so helpful. I have another question regarding my engine block. Long story short, I found paperwork under the passenger side seat showing that the engine was replaced ($10,500 dollars of our hard earned tax dollars. The truck had 9621 miles on it before replacement. I bought it with 9624 miles on it. Yes 3 miles then sent to auction. Makes me happy and sick at the same time.) Back to my question. On the driver side of the block is 14022660 which I believe means it's a 6.2 produced from 1982-1991. Is this correct and is this a good block or one of the ones prone to cracking? Second question, on the passager side of the block is M201. I thought the letter correlated with the month, but my calendar is missing the 13th month (M)! And I assume the rest means the 20th day and 1991.
Thanks again!
Phil

 

[Retiredwarhorses]

Look at the rear of the block at the tach drive emboss, take a pic and post...6.2 was also embossed on the block near the front right head.
6.2 and 6.5 was not prone to cracking...it was the 6.5 turbo from GM, fixed by GEP after bought the plant.
now, 6.2 and 6.5's have there own issues...as all engines do, for more info, go to diesel forums specific to those motors.