BTW, I contacted Reed Cams and they do not "add metal" to lobes, they grind down the circle. This is not bad (on many engines) but on an MB you would have to get new valve shims, and besides that being a PITA to measure, they are pretty expensive. So, it could be done but with new cams available this isn't financially feasible.

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86 560SL
With homebrew first gear start!
85 380SL
Daily Driver Project

http://juliepalooza.8m.com/sl/mercedes.htm