Swapping from iron to aluminum heads

As RRR said you can get more flow out of them. Yes they are lighter yes they can handle more compression on pump gas yes they are a hell of a lot easier to work on/repair vs cast iron. One of the things that need to be thought about is the cam as well. Is the cam you have able to take full advantage of the flow produced by the aluminum heads?

And yes I have Edelbrock closed chamber heads on my motor.