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How much would I lose going from a single plane, i.e. Holley Strip Dominator, to a dual plane, i.e. MP aluminum? Especially if I have w2 heads? (both intakes are w2 lol) Here is my combo: --1970 340 block bored/stroked to 422 cid (JE pistons, Eagle H-beams, Scat forged crank. Zero deck ft...