motorhead recently did this to his 1991 Montero. He did a little bit of a write up and took some photographs. Check this thread.
Motorhead, how did the timing belt change go for you.

I realize that they are not the same vehicle years but it will give you an idea of what the job will involve.

89 Raider - V6, Automatic, rear LSD, A/C Retrofit, Cruise Control Retrofit.