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

[h16]

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

[h16]

I have located and ordered a set of keys, waiting for them to arrive.

Sorry for being slow here - I'm just thinking this through for the first time.

I will go with your recommendation of 28 degrees of total advance.

A couple of questions:

if I use the 16 degree key, then that will make my total advance be 16 degrees plus whatever advance I set at idle?

You said you use 12 degrees initial advance - does that mean that at idle you set timing for 12 degrees BTDC? If so, how do you know when it's 12 degrees without an advance timing light - do you have a timing mark for 12 degrees BTDC? Mine I *think* has marks at 0 TDC and 7 BTDC (stock timing marks for 1.8). For me to achieve 12 BTDC I would expect to use my 0 TDC timing mark and set 12 degrees of advance on my timing light - as I understand it.

Or perhaps I completely mis-understand.

Thanks again for the info and lesson.