Just matching up body mounting points is going to be enough work, then you will have to figure out a/c & heating ducts, then getting aftermarket gauges to work with the sensors of the jeep, or getting a jeeps dash to fit into the VX dash somehow, then transmission linkage and engine clearance. I don't know which engine would be easiest to try and fit a VX engine bay over, but I would assume the straight six would be too long. And even still, is the wheel base close enough that the jeep tires would even fit in the VX wheel wells?