Moving the tread centerline in or out creates some steering and suspension geometry issues. Even using different offset wheels can cause problems, but that's probably the least difficult way to adjust the track width. Be sure you've got enough clearance between the tires and the frame at full steering lock in both directions if you choose to alter the track width. People have done some pretty dumb stuff to suspension systems, like shortening control arms, etc. when trying to correct track width problems, and some of them can be downright deadly in anything except driving in a straight line. Most hotrodders don't have the engineering background and/or testing capabilities to do steering and suspension alterations, but a lot of them think they're smarter than the engineers who designed the truck!
How about putting a flexible rubber flare along the front and rear wheel openings to sort of hide the too-wide front track width, and spacing out the rear track with wider wheels, or ones with a little more offset? That preserves the original steering and suspension geometry, and corrects the oddball track width cosmetically.
Jerry
