I think you'd have to route the right side exhaust to directly below or very close to the frame rail (the standard one on the driver's side is just inboard of the frame rail and a few inches below it.
The spare carrier vertical bolts are a bit inboard of the frame. There have been diagrams posted here of the '51 and later spare carrier that would help you visualize how the exhausts would have to run.


Kevin
1951 Chevy 3100 work truck
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1929 Ford pickup restored from the ground up. | 1929 Ford Special Coupe (First car)
Busting rust since the mid-60's
If you're smart enough to take it apart, you darn well better be smart enough to put it back together.