lmao, sounds like we got some bench racers!
the simple fact is, that no matter how you achieve the hp, a stock duratech bottom end will not support high hp #'s.
IIRC, Terry Haines has done some testing that resulted in rods letting go in the 280hp range (please correct me if I'm wrong terry) though there are some folks on the street running a bit higher than that (Worldtour and others) that have yet to fail a rod. Any decently designed forced induction setup for a Duratech will result in power levels right around this hp #, adding a large (comparatively) shot of nitrous (NOS is a company) to this is like saying "yes, I would like to pick up the pieces of my engine after they have been scattered to the wind."
The fact of the matter is that the duratec as shipped by Ford, is not designed to handle large amounts of horsepower, and if one wants to achieve large amounts of hp with a duratec, the engine must be beefed up to handle those numbers. Connecting rods are a definate, as should pistons be, possibly some additional main bearing support, and a new crank. How much of each really depends on how much power you are shooting for.
and fwiw, the same applies to the rest of the driveline, the trans, and the halfshafts, etc.
