Use or don't use vacuum advance on distributor???????????????????

Punisher66j said
Willys Carbs WCD50127 GM 604 Crate Motor 4 Barrel Carb, Gasoline
It is a 750 holley double pumper with mechanical secondaries that is built by Willy's racing carbs. They are great carbs.

That is a hell of a lot of mechanical secondary carb for a 360 unless it is a full race build and you know how to tune it.
Set the linkage so the secondary's cannot come in and try it again.
Just my humble opinion.