Edited: 11/19/2008 7:22:19 PM by doulovemins
What kind of tools do you have. A lift is crucial but not required. IF customs has a tons of construction pics that can give you an idea. heres a link to one thread with pretty good pics how they throw 2x3 inside the old frame and box it all in. or you can build a new frame from the fire wall back its hard to say without knowing how much work your going to do.
http://www.ifcustom.com/projects/projectspages/e-j/justin%20bd.htm