I am refreshing my 69S engine. I have the heads and cam towers off. Recently I have started to worrying about letting the pistons/cyc sit in the same position for so long. I started this project last November but it is taking a long time waiting for ordered parts to arrive. Should I worry about rust or pistons/cyc rusting together? I read somewhere that an engine should turnover at least one complete revolution every 3 months to prevent damage.

Don
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1963 356B Super
1969 911S
1981 911SC