They are pretty much ALL cracked, of course out of all the dodge trucks runnning around I never see any with a cloud of smoke following them so I just run em and don't lose any sleep over em any more. I have built tons of them and never had one come back complaining about coolant loss. I used to get them pressure tested at the machine shop but they never found any leaking so I don't even do that any more.

They are the best SB head the factory ever made, not just flow but tons of other improvements. The are not the best flowing mopar head ever... Pretty much any hemi heads from the 60s on flows better and the max wedge heads. They make as much HP as any run of the mill BB head.