308 head casting...

all the 308 heads are cracked in the same spots I have seen it doesent seem to hurt them and the can be made to make power .I know a guy that makes over 500 hp with them and not dyno hp
10.94 at 124 in a all steel full interior 73 cuda .3.31 stroke .
This motor ran fantastic with the cracked heads. In fact, I thought this set may not be cracked, but guess what.....
Just curious, when you (or people you know personally) find them cracked do you run them anyways? I'm asking to put this out for those that may want to learn. I want "others" experience/knowledge so folks that don't know can make an educated decision from a few perspectives on "what if they should find their 308's cracked". Thanks