Keep in mind the the rims may interchange...at least I plan to use an 8" rim that came on one of my Cubs on my Allis C. That could save work if the rims are in equal condition. Most Cubs had 8x24 tires on 7" rims, but 7x24 and 9x24 were also available on appropriate rims. The 8x24 marking was replaced by 8.3x24 many years ago. Are you sure of the size marking?
Tucker tire has new 8.3x24 6 ply Titans for $110 each, so that would be a good data point.