Yes you can get incredible amounts of power from just about any engine block. The key is how long and what for? I think the current generation of nitro burning engines gets well over 3,000, 4,000? hp, but I recall they need to be rebuilt after a few runs, and sometimes after just one. Some of the ricers are getting insane amounts of power, I think I read 1,000hp, but these are not engines or projects for every day driving.
I DO NOT speak from experience on the LS so...
The LS engine in it's raw form is probably capable of a lot more streetable power. The problem is that the way things are set up in this car, you would need to disable or redesign the way the computer system ties into things. That appears to be the big stumbling block
Supercharing apparently is much more difficult that we would think. Reading postings about the "almost ready for market" supercharger kits it is clear the several wannabe sellers are having a tough time figuring out how to make these kits work reliably on this engine. I thinks some have been "almost ready" for a couple years now. Projected costs seem to keep going up. Last I read it was past $5,000??!!
The Jag engines are the same block but from what I have read, use significantly different internals and intake/exhaust, computers and/or super chargers etc. Wish it was an easy bolt up, but you would figure after 6 years on the market, one of the guys would have got it, but I haven't read about it here.
The LS is a nice car as is. Would be more fun if it did have more umph, but guess that is the way it is gonna be. From reading, it sounds like Ford is concentrating their efforts on the Jag line as their premium performance line while Lincoln seems to be moving the way of mid range luxury like a Buick or Oldsmobile. That's unfortunate in my mind, but guess Ford has to make a living. Also could be Ford has to "hobble" the LS so that it doesn't out run the premium Jags. Kind of like the "Corvette has to be the fastest Chevy or else" so GM choked down a few good regular production cars that could have outrun the Vette.
If any one ever does get a good streetable bolt on package I might get in line, right after my warranty is up. Mean time I gotta find me a 79 Transam to redo so I can re-live my "American Giggalo" or was it "Smokey and the Bandit" days. Or maybe a nice late 80s early 90s or pre 73 Vette is the ticket?
Just my opinions,
Jim Henderson