From what I read on RV.NET, in mid 1999 Ford changed the heads on the V-10 and corrected the "sparkplug blowout" problem so anything newer than a 2000 will be ok.
It was also noted that if the sparkplugs were installed with proper torque and retorqued every 10k miles, then there is not problem even with the old heads, but what are the chances of finding a used one that someone did that too?
If you go to RV.NET and do a search for "excursion" there are 100's of threads compairing them and suburbans.
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Sold - 1984 V-20 Cuddy with a 2003 Johnson 140 hp gas sippin 4-stroke.
1995 Ranger 250C with a 2015 Suzuki 300 hp 4-stroke.
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