The 977L was an excellent model, and there are still plenty in use. For clearing, it would be hard to beat. For the road itself, a motor grader would be far preferable. With a 75% bottom and a solid drive train, $20K would be a decent buy, and you can usually get your money back. If you want to raise your comfort level, pull oil samples from all compartments, and take them to your nearest Cat dealer. Beyond that, just check for blow by and run it all the way out in forward and reverse. A 977L is a very versatile machine, but is really at home in clearing and loading trucks. Good luck!