This is true, I called Edelbrock as I wanted some answers before I milled and the Tech told me that Edelbrocks dyno runs with the mopar Airgap didn't show enough gain in HP or torque with the wall notched out so they don't offer it. The Tech did say the best thing I could do is run a half inch laminate spacer to help dissipate the heat, any taller spacer would effect the low end torque. So I'm probably going to leave it as is and run a spacer.
