Set "total" timing on a stock 318 two-barrel where?

Wherever it runs the best.

There are general starting points, then the tuning part of the journey begins. Some 318's like 32 some 40 before vacuum advance. So you have to find the sweet spot.
Anyone want to offer some words on the experience of an engine liking 32 better than 30? or what ever the total advance is.. And how do YOU personally go about experimenting to find out what the engine likes best.. All on a street car, no drag strip near by..

THIS POST ^^^^^ and not just 318's ! Let class begin by quoting... "Wherever it runs best"...... :D
I'm interested in how others determine what is "best". Initial seems to be fairly easy to determine, but total advance I am much less clear about.. AND It is something I am going to be playing with this summer..