carb question (Holley)

crackedback said
If that carb is less than about 20 years old, it should have the PV protection circuit in it.

I have cars that pull 7" of vacuum and have 10.5 power valves in them... If the idle is correct the PV isn't even in the circuit at all.

it has "05" in the date stamp in the main body by where the choke rod comes through the hat

if that makes sense but as far as year I have no clue - it does have a PV but no clue on the protection