Aluminum Heads

Here’s how I see it......

No one has a crystal ball they can look into and give a definitive answer as to how much more power will be gained by swapping your 452’s for some aluminum head........ on your motor.
There is only one way that question can be answered.
Go chassis dyno the car as it is, install the new heads..... retest.
If you’re not willing to do that, then you really don’t care what the difference in power is....... in which case the decision on which head to use is easier........ the cheapest one.

The way I look at it is....... Ede heads, and the copycats(stealth, sidewinder, promaxx, speedmaster), are all interchangeable.
On a mild build like this, in truly “ootb” form...... as in ZERO porting...... I wouldn’t expect to see 10hp difference between any of them.
They’re fundamentally all the same head.
The original...... and the Chinese copies.

Just pick one and go.