Should I mill my edelbrock performer rpm intake?

My only concern is that if I ever want to use the intake on another engine I will have to use gaskets from now on.
And it'll lose value in the resale, if it ever comes to that.
But here's the deal, if you don't mill something, the port floors won't line up, nor the roofs so the port window shrinks double the amount of the missmatch.
That might not sound like a big deal, but when the airflow hits those steps, chaos is the result.
But if I had to mill something, it would not be the heads,lol.

But here's another thought;
What if the angles are wrong, and the intake even after milling, still ends up standing open, either on the topside or on the underside? Won't you be pissed!
I think some detective work is in order.