When Ford (and most other manufacturers) use Dual Rear Wheels, they install a front hub that normally extends out the same amount as the difference in wheel offsets so the track, and therefore steering geometry, remains the same. Relative to suspension, the tire will end up exactly in same location on the E-Series chassis. Again, this may not be a Ford part but represents DRW hub.
This type is what comes on Axis/Vegas, and can be seen in picture he posted.
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