chuck is right it's near impossible to gage a distributor in your hand.
you need to stick a timing light on it rev the engine to what ever the rpm is that you get X amount of advancement then release the rpm back to idle and then watch were the timing mark is sitting. i'm quite sure there is some backlash that's built in the vacuum advance mechanism. so if it returns to X degrees then it should be just fine.
now i have a question for you.
i just spent time replacing quite a bit of primary ignition wiring and the resistors. now the 72 runs just fine. I want to keep the original system for general principles but I'd like to put a system like you did for general driving. (my 350sl rarely comes out of the garage) so can you tell me where you got your kit?
1972 350sl Red/Blk 117k
1988 420sel charcoal/Blk 140k
1987 420sel gold/tan 128k
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