I do not recognize those numbers as either a serial number or casting number. I believe the s/n is stamped in a flat spot near the distributor and the block casting number in a area near the starter.  Should start with a letter for the month  then two digits for the day and one for the year.  EX: A 16 8  being January 16 of 1948. 

Posted by: @al-perez

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Can someone tell what this 216 cu.in. engine is by the number on the block 2b2244b. Thanks

A photo(s) of the numbers and their location would help us help you.

 

@tiny I added a photo of the serial number located next to the dist

This site list ESN's by year and none look like what you have. Maybe a replacement engine ??  Block casting date would at least help to date it. 

https://chevy.oldcarmanualproject.com/models/engine.htm#47eng

Serial numbers used prior to 1941 model year were numbers only (no letters)

If the "b" is really a "6", the stamped number 2622446 falls in the range for a 1939 block from the Flint engine plant.

If it is a 1939 engine, the block casting number is 838710.  Hope this helps.  Tom

I think Tom nailed it. Those look like 6s to me.