Small Block & Big Block Chevy Specific - BBC Engine Code Numbers Trying to Identify

I have a BBC that i just bought in a 1969 Chevelle and I am trying to identify the engine the from the numbers on the front of the block passengers side. I one digit is kind of not very deep and I think it's an "L" number is as follows T0427LM. Any links or help is very much appreciated. Thanks

http://www.mortec.com

Mortec doesn't list suffix codes. Try this, it's listed here--suffix code LM: http://www.nastyz28.com/gm-chevy-codes/chevy-engine-codes-suffix-14.php

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