Assuming you do it youself, stop here and get out the calculator:
http://www.progressiveautomotive.com/street.htm

Don't forget the brakes:
http://www.progressiveautomotive.com/WWBB.htm

And what about the rear - stock out back will have the truck at a 45 degree rake:
http://www.progressiveautomotive.com/rearleaf.htm

Gotta hook up the steering:
http://www.progressiveautomotive.com/IFSparts.htm

Plus all the miscelleany to go with. If you pay someone to do it, multiply times two.
It isn't cheap, but when you get done, it'll sit like this:
http://www.chuckthetruck.homestead.com/files/pass_sun_small.jpg