Performer rpm or M-1 intake

A couple years ago when my car still had the 360 I was going to do a turbo setup so I swapped my RPM Airgap for an M1 single plane. Big mistake. The car lost 3 tenths in the 1/4 mile I could never recover, no matter what kind of tuning I did. The loss of torque was noticeable even on the street. It made the car feel sluggish down low.

IMO swapping to the RPM Airgap would be a good move.