I'm pulling apart my parts car, and am interested in what people do in preparation for mothballing different parts that they save away. For example, heads - can I just leave them intact if I'd probably be replacing the valve springs anyway if\when I put the head into service, or should I disassemble them? Anything I can do with the block to flush it out and prevent any more corrosion in the coolant passages? I suppose in a perfect world I'd do some combination of dipping, stripping, and then dunking into a 55 gallon drum of cosmoline, but for the guy who hasn't done this and has all that on hand, what's the low hanging fruit to at least do something to keep things well preserved?