dual plane vs single plane?

Theres been a few shoot outs where they switched a rpm air gap for a m1 single plane,the tests were back to back for h.p. and e.t. and the differnce between them was minimal.Your peak torque will not decline with the single palne but you will trade around 10-15lbs ft. on the bottom for 10-15 h.p. up top-at the track its barely noticeable on a average 12second car.On the street it will feel alot more significant since off idle drivability will be a bit more soggy.The m1 is not a full race manifold like a victor,it still retains a decent velocity and runner legnth and its modeled after the old strip dominator.If it were me with your combo I would stick a rpm air gap on it.