[bubbagump]

My input would be the intake manifold, camshaft combination. This dictates the engines torque curve much more than the ignition system.
A Victor Junior, single plane, only makes 6 more HP over a Performer RPM, 180 degree (dual plane), on the big end. However, the HP and torque on the low end is FAR superior. And similiar results could be quoted on camshaft of different durations.
And, the MSD 6 fires the coil 5 times below 5500 rpm then over 5500 fires the plug twice.