I sold my old Mazda van and now have the money to put into the 300D. So what are your suggestions to pro-long the engine of my 150k mile diesel engine. Valve adjustment, new valve job? Timing Chain Check? Everything seems to work fine now. It has all new belts, oil, filters...

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2000 Ford 7.3 Powerstroke 4x4
2006 Mazda Tribute
1983 Black 300 D (donated to charity)
1993 Teal 300 D (160K) Sold
"I love the smell of burnt diesel fuel in the morning, it smells like ....VICTORY"

Semper Fidelis
USMC 1973-1976