Anyone have any real world experience on the Edelbrock Performer RPM, Edelbrock Performer RPM Air Gap and the Edelbrock Torker II? Whats the main difference between the RPM and the RPM Air Gap? Also would it be better to chose the torker II since its a single plane, or for my combo is a dual plane better suited? Leave at 2400-2600, shift at 6100, traps at 6200.