IMHO, Toyota bottom ends are virtually indestructable. My step-son's 3.0L burned #6 exhaust valve at 130,000, and I decided to check the bottom end while I had it apart. You could still see some of the original honing marks in the cylinders (even at the top -- the blocks must be harder than the "hubs of hades"), and the bearing clearances and crank journals were still on the tight side of the specs for a new engine.

If the truck has had regular oil changes, I wouldn't be afraid of it at all.