For LPE, the numbers are through the STOCK exhaust up to the muffler section...stock manifolds & cats. Put some headers, 3" cats, or off-road pipes, and you get the picture. Also, don't forget that they give a rather generous warranty and focus on durability and driveability vs. an "ultimate" dyno number.
I have dealt with them before and have been very happy with heads and camshafts from them for other cars including my 01 Formula (10.50 at 128). While not cheap, you don't get their reputation by accident. At the same time, if you want a full-tilt race motor vs. a street or stree-strip car, they can do that too.
In my opinion, Lingenfelter is a legendary name, especially when you talk about their Corvette packages. But still, 7000 bone for 100 ponies, not to mention it's all crank ponies, is rather high. Even with the name and reputation, I don't think it's worth it (a la BMW).
Sure, it'd be nice to say;
You: "Yeah Bob, just got the new Lingenfelter package in it. Bumped me up to 400."
Bob: "Nice, Is that crank or wheels?"
Bob: "How much that set you back?"
You: "Just the kid's college.........."
If you want LPE, you want it for the name. His work is top notch (well not his personally anymore R.I.P.), however, you can far supercede their power levels for considerably cheaper and have just as much durability/driveability.
Sorry, I know several people who paid a lot of money for LPE stuff and for him to sign the underside of their hood, only to be outdynoed and out 1/4 miled by a no name set of h&c that I built myself on a hoist at a Chevy dealer.