Disconnect the vac advance line at the carb and take a small piece of rubber hose with a bolt stuck in one end to plug the carb. This way you know that only the mechanical advance or baseline timing will be set. I would suggest If you haven't yet done a search on this web site for "ignition timing" set the search to all fields. There is a wealth of info here to walk you thru this very important procedure. Remember we are here for you if you get stuck.
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"Drugs are money, money is power, power is security." - Kent Heiner
Nedrow population 2212
Carbon footprint family of 2/11 tonnes of CO2/yr