Sorry, sly, that does not match GM docs that I have.

K 11 5 looks like a date casting code:
K = 11 = November
11 = 11th
5 = 1955
A date casting code appropriate for a 1955 second series and later 235.

Can you take a photo and attach/post it here? The engine serial number is pressed/stamped into the block in the smooth/machined "ledge" behind the distributor, where the enter the block.

http://www.1954advance-design.com/Web%20images/casting-code-photos/codes-ser-nums.html