Ya, the fun days when GTP's & GS's were the new hot thing for mid-level everyday performance cars in the early 2000's was a blast (got my '98 GTP back in 2002, and immediately started working with local ClubGP groups as they grew). There is a formula to getting them to specific benchmarks, and plenty of people popped engines trying to jump the line without the right parts.
Between Michigan, Minnesota, Upstate NY and elsewhere, I've probably worked on about 75-100 different setups, and everyone loves when they get that extra "boost" from some properly dialed-in upgrades... either a basic intake/exhaust/pulley/tune setup, or a full-blown cam/heads/transmission/turbo/etc. build that makes it the quickest daily driven sedan in the next 5 neighborhoods. Some people try stretching the term "daily driver" to include their garage or trailer queens, but until you've beaten a guy on a motorcycle with your 3800 GTP, with 3 grown men in the car and another 3800 in the trunk, it's hard to compare how much many of those cars actually get "driven" daily.

(He tried saying his faster bike was back at the house, and I simply said I had an engine in the trunk... his attitude towards a rematch changed as he saw how sagged the rearend was.)
Fun fact: that trunk engine wound up in the world's fastest 3800 Impala, which retired after going 10.0's with the same kit I just installed. It was drag prepped and driven by the king of 3800 FWD racing, Matt M from ZZP, though, so I don't know how close to that I'll wind up.