Any structural parts I would do first. Make sure everything is braced to keep aligned. Are you making any of the parts? Some of the outside cowls or cab bottoms or corners can be handmade using sheet metal and bending yourself if you have the time/ability/tools. Taking your time and asking a lot of questions work too. I am by no means an authority. I just like puttering. pics below

Dan
http://community.webshots.com/photo/512683224/2513280780071274430pylrqH