how to set timing - mallory mechanical advance on '74 1.8 Options

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I need to set ignition timing on a '74 1.8 that has a mallory dual-points mech adv distributor. Model # of mallory distrib is 2354101, in case it matters to someone.

Anybody have tips on how to set timing on this setup, assuming the rest of the engine is basically stock?

Prior to any attempts to set timing, I plan to replace both sets of points, condenser, and adjust the dwell.

Thanks in advance for any help

[MarkV]

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Yes in this example 12 initial timing + 16 advance = 28 degrees total advance

My T4 engine is set at 8 degrees and is programed for 20 degrees advance, so 8 + 20 = 28 total advance.
Mine is a crankfire ignition, but I've also done this with a mallory using the 20 key.

To me 12 degrees initial advance is too much, I aim for 8 degrees and 900rpm idle. 10 is about the most I ever use.
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Interesting. Seems like when I tried setting the initial that low I had a problem with an off idle bog. That was using a Bosch 050 distributor. Don't know if I ever tried it with the Mallory. What is the issue with running too much initial advance?