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New Guy - J13 vacuum advance questions


jarvitron

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Hello - I've recently bought a 1967 Datsun 520 (in the elusive "half-painted with purpleish house paint" shade), with the original J13 engine. While I hem and haw about what to replace it with (and the dismally loosey goosey fourspeed which lopes ponderously behind it), I am trying to make it run its level best.

 

Aside from some quite obvious carburetor issues (leaking, misadjusted, runs eye-squidgingly rich), the engine runs like a little (slightly asthmatic) top, and when all the rodents run in the same direction, it gets me up to the speed limit in an acceptable amount of time (fast enough for Portland, Oregon anyways). However, there doesn't seem to be a carburetor vacuum source to run the distributor advance diaphragm off of. There is instead a manifold vacuum port hooked up to it. Does this engine have a vacuum retard instead? Is there a port I'm missing on the carb? Anybody have a good picture of how the vacuum line (really there is just the one) is supposed to run on a J13? I looked at the PDF's of the FSM (on Nicoforum) but couldn't see any clear pictures of the vacuum line.

 

Thanks - Aaron

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