I was going to use a bolt/socket/washer combo to pull the two pins that need be removed to yank the head. Measured the inside diameter of the upper pin with a dial caliper and got 5mm. The 5mm bolt I bought slid in the pin without stopping but the 6mm bolt I had was too big.

Any ideas? 5.5mm special tool only?

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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