5.4 Build.

I recently skimmed over a MM & FF article about a 5.4 sohc in a 99+ stang and although i was dissapointed from the baseline hp figures the torque is great. I was thinking about N/a Dohc 5.4 navigator build up. What kind of power can expect from say a mildly built 5.4 dohc motor w/ cams and some mild head porting along with the basic intake+exhaust mods?

P.S. I assume since it is a navi motor and also part of the modular family that the block would be rather weak so Nitrous would have to be minimal or am i wrong?
 
The modular block is strong as hell. Some guys put 1600rwhp through that block. It's the pistons and especially the rods that are a little weak. I'd say you're probably good to 450rwhp/525rwtq with a good tune. Any more than that and I'd consider forging it.

BTW, anybody know if you can stroke a 5.4L, or is it pretty much maxxed already?