vac. secondary

I'm going through a holley 750 vac. sec.[80508s]. Anyone know the factory setting for the sec. blades ? Just want to check & make sure it hasn't been monkeyed with before.

Open it up so it's not bottomed out in the bore.

I've flipped the set screw so you can access it bolted to the intake. Or even switch it out to a hex head set screw.
Then you can open it up a bit more to bleed in some air on big cammed engines.