I've had two catastrophic crank failures in my 1995 K 3500 within 100,000. I owned a 6.2 in an 85 K 1500 that went on and on but finally gave up due to starter bolts failure cracking off the block. Found 1984 6.2 engine in a Winnebago 95,000 actual. The engine so cleans it doesn't even have...