Now you have me second guessing myself. I'll have to check my alternator location. Is your 3.0L a 12V or 24V? I think the old Montero 3.0L 12V had it high, while my 24V and the 3.5 have the alternator low.

In California the t-belt is supposed to be good for 100k. Same belt. Go figure. If you rebuilt a 302, I'd think you'd be okay with the belt. I've never done a motor rebuild, and I did my belt without any real hitch.

Big Truck: 00, 3.5, Endeavor, 5-Spd drive line in hand!
Little Truck: 87, 2.6T I/C, MT, LSDs, Tonneau Top
Her Truck: 03, 3.8, 20th Anniv, 65k
Daughter's: 06 Eclipse, Keeping it Mitsu!
FSMs: MitsubishiLinks.com