Just passed 500,000kms(310,000k) last week. Still have the original vp-44 , injectors and 53 block. The only items replaced on the engine Apps,alternator,starter contacts. All other componets like water pump, airconditioning pump, power steering/vac pump sensors, idler pulley etc are original. Truck runs like new,never refused to start, no run or driveability problems. On fourth lift pump, moved back on frame after number three. Fuel system is still standard with no up grade of fuel line sizes,still has banjo bolts.