Just make sure it's mechanically sound, wheels are true, and the tires are in good condition. You might want to add some bar end extensions for more hand positions. The gearing is right for loaded touring in hilly areas.

As to how much weight it'll handle, I doubt you really want to test that as it would involve breaking something.

With decent racks front and rear, it'll for sure haul at least 60 pounds of gear safely. That's about 20 more than you'll need, unless you'll be crossing a desert and need 2 or 3 gallons of water. Unless, of course, you weigh like 275 pounds or more. Then there might be a problem.