98 silverado 350 to 454 vortec swap

Im looking at swapping a 454 vortec in place of the 350 vortec, anyone have any experience with this and what will it require

You are in for a lot of changing.
Lot more than just a engine swap.
You will need the complete computer and wiring change over.
Front springs to hold it up and brakes to stop it and a rad to keep it cool and the transmission to go with it.
Engine mounts and transmission mounting an fuel tank system.
Also license and title and insurance change over.
Read this link real good to.
http://www.epa.gov/air/caa/caa203.txt