360 timing questions

No, no no. VACUUM advance "way out past 40" is for when you are tripping along 'easy' on the highway, light on the gas, not climbing a hill, not loaded down, etc,

WHEN YOU start to give it more and more gas, going up hill, or loaded, or just acellerating, the vacuum DROPS OFF which RETARDS the timing, so that with your foot on the floor at hard load, you EFFECTIVELY do not HAVE any vacuum advance.

You should be timing this (depending on compression, cam, fuel octane) 30-40* at high RPM, IE with all mechanical "in" and vacuum UNHOOKED whether you are going to run it or not.

The more you advance it, the worse it will ping.