Your calculations seem accurate. I would definitely go with the 8" rim. Either tire should do fine on that size rim. It comes down to preference on tire width. I remember some people going from 10.5's to 12.5's and wanting their skinny tires back.

I hope the boggers will be trail tires. They're not fun on the road <img src="/forums/images/graemlins/shiner.gif" alt="" />

<img src="/forums/images/graemlins/cheers.gif" alt="" />Andre

"SERENITY NOW!"

1995 Passport - TH700R4 - Twin-sticked Dana300 w/tera 4:1 - Leaf sprung SAS w/Dana 60/14BFF - 38.5x11 Boggers - DOR bumper w/ MM SE9500