That stock block stuff is a bunch of BS. It will take it!!
I have a good friend of mine. Stock SBC. 600hp NA and he hits it with a 400 Shot of Juice. It has not skipped a beat. If a POS SBC can take it a Mopar will as well. It is all in the tune!
Here is the proof from people doing it....... Forget the He said she said BS
http://www.forabodiesonly.com/mopar/showthread.php?t=165579