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

I've always believed that individual engines are all a bit different. Heads, pistons, cam, probably even type of exhaust / headers and maybe header length may have a small role. "Approach carefully" and watch for damage on plug readings

Nowadays, O2 wide band, infra red temp readings, etc make guesswork "less" I also "guess" that common alcoholized "pump" gas is more forgiving

The cam MAY hide obvious audible ping and of course at WOT and high RPM you won't hear it either