Peace of cake haha. I've made a write-up for both the motor swap as well as the HD swap. Transmission isn't really needed to swap and is also an easy 3.29 gear upgrade, unless of course this is the reason you pick up the donor GT for cheap, in which case just swap motor and trans and run the GTP PCM. Simple plug and play
http://www.grandprixforums.net/f73/l...deo-23248.html
http://www.grandprixforums.net/f73/h...ans-22464.html
also, if not already installed on the car here's a good HUD/DIC install guide
http://www.grandprixforums.net/f73/a...03-a-8171.html