No the power valve goes to the intake manifold only.
Never to the base of the carb or any where above the blower.
You do not want vacuum acting on the power valve when the motor is WOT under boost. This would close the power valve @WOT and burn the motor up.
Start with the idle eze closed. Give it all the spark timing it needs at idle.
Make sure both carbs throttles are open correctly at idle, and the same amount.
(idle fuel transfer slot exposure) Flip the carbs over and look and preset them , before install.
The idle eze will only be needed if the cam is huge., if at all.