Questions about buying a Shortblock

Hey Fellas,

Been gone for a while, getting back into pimping out my truck, since I just destroyed my second 4L60E I am now on the hunt to build a motor and trans.

There is a guy who has an 08' LQ9 out of a 2500, he says that it came from a GM dealer, where it broke a connecting rod due to hydrolocking the motor....

Obviously the block could be completely trashed, is there anything super obvious to look for besides, cylinder walls and crack in the block?

Thanks.

No 2500 ever had an LQ9, so.....