Airbagging questions???

Okay so I am really excited because I got on the web and bought me a KP 6 link and front cups and such from slam specialities for my 02 Sierra but now im wondering what to do to clear the fuse block under the hood?? I have heard to move it under the dash but how much work is involved in that? and i have a strange feeling that im going to drag through the factory gas tank what can i do about that???