edelbrock magnum head flow?

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I just picked up this from a member here for a great deal so this is the cause of the wheels turning lol. I have a Weiand top I will adapt or design and fab a plenum from scratch myself. But I’m picturing a 408 or 426 with bigger cam, bigger headers, tram and dual 750s and an 8 inch verter. Just need to squeeze a bit more out of the heads. But obviously I’m just bench racing here and a lot of thought will have to go into the future combo. Just getting some ideas here