No matter what it cost you for the new engine, you only paid $200. Now you'll have a truck with a new engine. It should be good for another 100,000 miles. What could go wrong? Considering it's a '97 w/ 144,000 miles; you'll just have to be ready to fix whatever else breaks on it next. Radiator, fan, electrical, emissions control, exhaust, transmission, brake system, and whatever else. That, and do all the deferred maintenance. What could go wrong?