V8 Tundra timing belt. 60 or 90k miles?

[JS44]

How often should a V8 Tundra timing belt be changed? One place says 60, 000 miles and the other says 90, 000. I don't want to do it if it's not neccessary at 60k but on the other hand I don't want it to break either and damage my engine.
Also, is it really a good idea to replace the water pump when the belt is changed? I can see the logic in doing that but how long should the water pump last under normal operation? My last Toyota had almost 200k on the original pump and it still worked.
What I'm mostly concerned about for now is the timing belt.
Thanks.
JS

[chronoti]

you can check your owners manual it should say but i changed mine well after 90k more like 130k but i was taking a little chance they recomend 60 for some pre 97 cars and 90 for 97 and after. it's your call if you do want to change it but i say wait till 90.

[JS44]

Chronoti,
Thanks for your reply. I found it later in the service manual and not the owners manual where I looked the first time. With that information I'll probably wait until 90k.
Thanks again.
JS