<br><font size=2 face="sans-serif">The twin plug head in the Bully is designed so that each plug in normal to the hemi head. This puts them on an angle, one in front, one in back. Adding a plug to a single plug head would have to be planned carefully because I'm not sure if there is room, and you don't want to change the compression ratio.</font>
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<br><font size=2 face="sans-serif">When done right, the idle is more reliable, and the transition is smoother. Midrange is not as sensitive. I have run my Bully with one plug burned out and can claim these improvements. I don't experience lower idle, as is being claimed for these other heads.</font>
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<br><font size=2 face="sans-serif">The lighting procedure is simpler than you'd expect. Light one and start the engine. Run the engine at full throttle for a few seconds, and this lights the other. You don't need to put the headlight on both.</font>
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<br><font size=2 face="sans-serif">--Lance</font>
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