Be aware of the different diameters of a 6.00x16 and the modern "equivalent" 215/85/16 and how it will affect your hill climbing and overall performance.
The 215/85/16 radials I put on are two inches bigger diameter than the 6.50x16 bias ply. Great for lower rpms on the highway, but the straw breaking the camel's back in the mountains. (My 216-powered truck has 3.55 rear end, which ain't helping low end grunt.)
I've considered going back to 15's and using the modern equivalent of the old G78-15's that were on the truck when I got it, and used for many years with great (but slow) results. Modern equivalent for those is 215/75/15 and same diameter of the old 6.50x16.
