Money pit and cars? What car isn't? My Foxbody is a prime example of that. Spent 8 grand on the paint and body, another 2 grand on the engine and suspension, couple hundred on the interior. Now I'm switching the setup and going LSx which I'm sure will end up being a couple grand.
Turning Grand Prix's into turbo cars are money pits as well, I don't suggest it unless a person wants to marry their car, or is content losing money in the long run.