That's exactly how mine looks. I still haven't been able to get in touch with my tuner to get the files from my tune emailed to me. And haven't sent my injectors off as I have been toying with going with a 68HTA.
If there was a cracked ringland it would have to be small. As in now gone in the torched section of the piston. It is hard to tell as the rings are now fused to the piston. Could just det cause the erosion/ melting? I ask because I imagine it as a force acting on the piston in a way that would "break" the piston not melt it like ours.
yaya20, what kind of pistons were you running?