vacume advance question

[prg machine]

See if I have it right. My engine guy says no more than 32* total timing on the 383 roller cam engine I am installing with a MSD Billet Dist. and 6AL box. If I understand correctly I set the dist. timing with vac plugged at idle speed to like maybe 12*.. Then with vac hooked back up to vac advance I run engine up to say 1200 with light on timing mark and damper tape and romp the throttle hard. I should see no more than 32 on that timing tape.
Do I have it correct????