Their was a wright up in MMFF a couple months back on a guy who did this. I don't think it got too tech. on the details but they did have some info/dyno #, etc.
There's a write up on the 5.4L swap in the January issue of 5.0 Mustangs and Super Fords. Like Blk03GT said, It's not too technical, but has a dyno chart where w/various different bolt-ons were tested.