jbcherokee - you should be able to import the 2d AutoCAD file into Inventor as they are both autodesk programs, and I believe are designed on the same platform. Therefore you should be able to import the 2D file and extrude it in the 3d modeling area.
i took the autocad .dwg file from cben.net and imported it as a 3d model into solidworks and it works. havent checked to see if its dimensionally acurate at all, but it looks like a jeep
I would be willing to come up with some bucks for a good accurate SolidWorks 3D model of an early XJ. I might even be interested in a late model as well.
my company was looking into getting a laser scanner to scan historic cabinets into autocad for identical reproduction. but we ended up losing the job bid so we never got it. i could have made a super accurate model of my jeep. that thing was fun to play with.