It all started when my 2000 GTP was running rough, had a smell of gas from the engine and had no power. I hooked up the scanner and sure enough: P0300 - P0171 - P0102 - P0452 were the codes I got. I gutted my cat a week ago because of the same symptoms and the car worked fine for a week, then these codes came up. After alot of research, I figured out that I have some major issues. The upper intake gasket (supercharger gasket) is leaking and causing a lean condition which is causing more fuel to be pumped in to compensate (now I know why my fuel mileage was crappy).

So, I also figured while I'm in there, I should do the lower intake gaskets as well. I'm also replacing my valve cover gaskets that are leaking too. And, replace the coolant elbows since I have no idea how old the ones on the car actually are.

A few questions from some of you who might have done this before. Are there any tips to make the process go any quicker? Anything I should look for, or anything I might come across I need to be prepared for?
I found this excellent video on YouTube: http://www.youtube.com/watch?v=-2ZbFwTNjhg which shows you how to replace all the gaskets. I am also lucky enough to have AllData with the procedures on how to do it all. I'm just hoping for some tips from the experts here! Thanks!