I think you'll need 7:00 rims or wheels, whichever style you have, to accept 9:00 tires. The smaller tires you mention use 6:00". 8:25 NDL MIL tires are availabele pretty cheap quite often and even those use 6.5" rims so putting 9:00 on a 6" rim would really be a stretch. Call a local truck tire shop and confirm but what I'm saying is from my memory and my own experience.
ps. where is Nixa? Near the tornado path? I have property in Howell Cty and hope it's still standing.
