Well for starters, upper ball joint for the E350 is the same for E150 and E250. Shocks are also the same. I use Moog on all my suspension parts. I use Monroe shocks and have tried Billstein (or how ever you spell it) in the past with no difference in any preventative maintenance schedules. I use Michelin XPS Rib tires. And for tire wear, make sure you follow specifications on tightening wheel bearings. I know it sounds silly, but it does make a difference in tire wear. Check ride height, every two years, I replace front springs and rear leaf springs. If rear brake shoes, I check and adjust every 1000 miles or so. Other than that ...... happy motoring.