[goatwgn]

Here is my 500000 mile Olds 350, back in 2013, that had never been apart, except for water pump replacement. Top picture is the same unit, rebuilt, back in the '74 Olds Cutlass. This thing is tough. I didn't "baby it" over the years, but i did keep the oil changed, and never overheated the engine. Inside was very clean, with very little wear. Valve springs and rings were weak. Some carbon buildup in the valley, where the exhaust crossover had a leak.