Cracked head question

[Dave Donaldson]

I am a wee bit embarrassed to ask ,, still new to the Benz thing. Spent alot of time reading the forums going back through them has saved me costly mistakes , time and money. But I keeping reading a thing called bad heads cracking or blowing head gaskets. I have a 1987 300 SDL 350,000 km on it, and my question is which heads are prone to having problems,, what kind of problems and is there a model / year that a counter measure head was made,,, some have mentioned # 14 head,, and so on ,,,is there a fix?,, My goal is to keep the drive train , basic and original,,no upping the boost,, stock air filter housing etc,,,I have rebuilt 5 Chrysler heads 2.5 turbos,, warpiing cracking the best cure was the mod 1988 head with better water cooling passages,,,I ain't afraid to get my hands dirty, but sure like to know the info before I mess it up How can I tell if I have a bad head ( puns welcomed,,I am old enough to have a bad head,,2 heads are better than one lol ) and or should I plan on getting a back up head ? cheers Dave D.