Not a Mopar but, I have a friend that ran Eagle cast cranks in a stroked Big Block Ford. It made around 850HP on an engine dyno. He would freshen the engine every 3-4 years and find cracks in the crank via magnafluxing. He'd rinse and repeat every 3-4 years. The cranks were like $500 at the time and he just didn't want to spend the money on a forged unit any time he freshened the motor.

So; completely broken, no but, not perfect either.