Scott
Legal is just a number we must abide by. Your driving habits and preventative maintenance will greatly determine safety and the endurance of the truck and it's components. You said you drive like an "old man". That tells me you accelerate and decelerate mild to moderately, slow down or avoid bumps, dips, pot holes, railroad tracks, slow to turn sharply, shift with regard for the clutch and drive train, warm the engine before going to a full strain, never let the drive axle hop (like in sand), etc. Shock and uneven loads bend and stress everything. Keep your lubrication and cooling schedules and watch the wear items, brakes, hoses, belts, etc. I've found it will stay with you longer if you drive it like you own it instead of driving it like you stole it. Good looking truck and set-up.