I think those 31x10.50s may be my best bet. The wheels I want to use are very deep dish so the swap bar issue may go away.
Since I'm putting a '54 GMC cab on the S-10 I want to be able to test fit this thing with the tires on it so I can mount the cab to avoid any issues.
I've posed some questions on Pirate 4x4 and will wait until I see what the response there is, but I think you've probably answered my question with that tire size.
Thanks!