new guy with engine i.d. question

Hi guys, new to the site and have a question on my bb chevy engine. i,m trying to identifiy my engine block, the i.d. pad on the front passengers side reads...CBB143384 and the front center of the block has the stamped no...TO325TRL ... any info would be greatly appreciated. Thanks.

Check the back of the motor for the casting number. Go to this website once you have your casting number. Big Block Chevy Engine Parts casting numbers and Identification