450ish rwhp seems to be the number thrown around as being relatively safe. Some people make more and some make less. I think the amount of power it can hold safely will depend on how good of a tune it has.
The Stock WAP block can handle quite a bit of power. Some say 650whp some say 8 or 900whp....Guess it depends who you talk to. Now the Stock Pistons/rings are a different story. Most will say don't run more than 500whp. Some run more for thousands of miles without issue and some throw a rod at 450. I push 500whp with a Vortech V3 and a built 5-spd trans on stock internals and have no problems at all on my 04 Mach 1. Though I am in the process of building a fully forged internal stroker shortblock just in case!!
thanks man, that's what I assumed also. Long term it will be built but if I came across a sweet deal on a blower id throw it on and run low boost for fun lol