My baby just turned 164,000 miles and it's nearly time for new tires. My question is, with that many miles what do I need check on the front end before I stick the MT/R's on it? The steering still feels tight and it runs straight. It does shimy a little above 60mph, but I think it's mainly because the Swampers wore so unevenly even with proper rotation and air pressure. What do I need to check or replace under the front end?