There are quite a few posts and articles regarding this subject. Short term, sure you may have no issues. However, long term it is likely that you will. The non-forged internals aren't designed for boost in the 392, which is why they use forged in the Hellcat.
www.americanmuscle.com
Tens of my friends owned different model of 392 (2011-2014) are suffering from bad pistons. Their cars are stock and some of them tuned. The common th
www.lxforums.com
A quote from failure post:
"The broken ring land is classic 392 failure from excessive heat and pressure, or detonation. The rings are very close to the top of the piston, as you can see, and excess heat (like from a very lean tune or boost) can make them expand and the ends butt together, which forces them outward, breaking the ring land of the piston."
I think you're playing with fire on this. Will NOS cause your block to implode immediately? Likely not. However, long term or even medium term effects would likely be seen to some degree, possibly including shattering a piston. The extra pressure that you're inducing on the combustion chambers pushes the 392 6.4L pretty close to design design limits (I say that twice because from what I can tell, you're beyond the margin that SRT Engineers put in place when you use synthetic aspiration like this). Read up on the piston ring gap in the 392 6.4L. It's very very small. This is another reason that they used the 6.1L engine for the Hellcat and not the 6.4L.
I have not run NOS, and so I don't have experience with it - but I am speaking from perspective of Engineering of the engine, being an Engineer myself.
