Just do what i did, Lower your final drive ratio to match the tire size that's way better than changing out the speedo gear.
It will be one of your favorite mods and your speedo will be spot on like mine.

5.29! 5.29! 5.29! 5.29! 5.29! 5.29! 5.29! 5.29! 5.29! -Chants the crowd <img src="/forums/images/graemlins/evil.gif" alt="" />

1999 Montero SAS'd on Kings and stuff

1998 Montero trying to get a V8 Swapped