If it has not happened to you IT WILL eventually, show me a KNOWN 200K+ mile SPI that has not had the head fixed, you wont find one. The SPI's are well capable of 200+k miles, just not with the orig head, it has seen 1000's of hot/cold cycles by then. Mine made it to 173k miles before it dropped and my last focus did it at 98k miles.
I HAVE GOOD USED OEM PISTON AND ROD ASSEMBLIES FOR ALL 2.0L SPI ENGINES (FOCUS, ESCORT AND TRACERS)!! PM ME.