Will the 117 head fit the 116 engine, 1983 380sec ???

A 117 head itself will bolt up to a 116 block.
However, the valves in a 117 head are larger then the 116 valves and may hit the block when they open, since the 380 bore is only 88mm and the 500 / 560 bore is 96.5 mm.

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76 240 D. Bought in 1998 for $25.
85 300D. Got it for free with a bad engine. ( Sold )
60 Unimog 404. What was left of it, was given to me. Now powerd by 617A.
88 560 SEL. Bought without engine and trans. Now powerd by 617A.
67 250 SE. Cuope. For resto or sale.
64 220SE. For resto.

thanks for the info...