Best place for spare tire on Terra with Harvester option

[Falco]

I’ve been wondering about this for a while now, but is there a good option for the spare tire on the Terra when that spare space under the bed is taken up by the Harvester engine? My thoughts are just in the bed, although that will take up a ton of space. A swing out carrier would work but forget using the truck with the tailgate folded down for moving all sorts of stuff. Any good options I’m not considering?