Porting Edelbrock RPM air gap

At least in the case of big blocks, when it comes to induction, you truly can't compare GM to Mopar. GM likes restriction before the heads, Mopar does not. You'll also see that peak RPM in a BBC will be higher with any given cam grind vs. BB mopar. I'm not saying that based on reading anything, i'm saying that based on various engine builds and dyno time.

Now whether that applies here, or not, IDK, but I wouldn't be making a decision based off a magazine article about a SBC test.

As I said before, I'd either port match and blend, or I'd be talking to a porting expert, such as @IQ52 or MCH, etc.