Oh and another thing, sorry.
I should mention that the items changed were the chain, cam sprocket, tensioner and that little plastic "tunnel" guide that the chain passes through right after traversing the cam gear on it's way back down into the dark regions.
None of the other guide rails were replaced. My mechanic said the tensioner rail couldn't be replaced with the head in place (OM 617) and after reading threads I found in a search, (thanks to Webmaster for the tip) I'm worried about those old rails.

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63 220S W111
76 300D W115
2013 VW JSW TDI M6

previously-
73 280 SEL 4.5
86 300E 5 speed
2010 VW Jetta TDI M6