Call ARP if you are unsure. This is more about bolt characteristics than the head itself.

Do the instructions require a different torque spec for another style head, aluminum vs. iron? If not, I'd tend to lean towards the ARP spec as they designed, manufactured and tested the product. Edelbrock has no idea regarding your ARP bolt characteristics.

and for the "But you ain't got no legs, Lieutenant Dan." crowd. He's already identified a discrepancy. Might that be the reason for the question.