For anyone who thinks Ritter is not aware of all of these issues with this generation of their stuff you would be sadly mistaken. They are fully well aware of the issues, and they are numerous.

As for the cracks we run a 60MM in a SB Chevy Dart Block that sees a fair amount of spring pressure and makes a bit of power and has no cracks at all around the cam tunnel. We just replaced that block this winter, BTW took 7 months and was well over $7K when done, just for those who think its only Mopar guys waiting for blocks. It did have some custom things done to it but nothing crazy, really just relocating the lifter bores so we could have better alignment with the heads we run and get away from the 1/2" wide cam bearings we had been using..