Performance timing

So richen the fuel mixer screws till i just start to hear the engine/idle start to slow down or see the vaccum gauge decrease in psi? 512Stoker was talking about knocking timing down at idle at 15 º but didnt say what the rpm is suppost to be at then take it for a drive and see if it pings and if not bump it up 2º each time till it does start to ping then back down 2º or until it stops but didnt say which vaccum port to hook up the vaccum advance to on the edlebrock carb???? I was not great at book work in school / mathematics . Im great at being hands on so what is the basic way to tune this engine? I cant seem to get any of the "mopar people " in my area to help me even though they have their stock or modified engine tuned up? Then i get on here and get like 20 different suggestions . I gave a basic discription of my engine build/parts all i want is a basic way of tuning this engine for example: start engine ,let fully warm up, unplug vaccum advance set dial on timing light to zero, adjust time to so and so degrees and set idle in park or in nuterual to so in so rpm's etc.
The rpm is going to be different form engine to engine.
My 340 idles at 850 in neutral and around 700 rpm in gear. Alot of it depends on the torque converter and how loose it is setup.
My vacuum advance is connected to full manifold vacuum - below the throttle plates - Edelbrock carb.