Did your machine shop, or the seller's machine shop say that? Was your
oil pressure stable previously? Your info says that the car was built in 2003, so it's not like the motor has reached it's normal service life. Make sure you get to the bottom of why it happened to make sure it doesn't happen again...
Scat seem to make a popular crankshaft and conrod at a very reasonable price, so you might get the extra cubes for not a lot of extra coin. As 427s mentioned, do some homework with the piston choice.