[What'saCobra?]

Nobody asked me for my 2¢, but i used the MSD distributor and gave the FORD unit away to a low budget Mustang hotrodder. The MSD dist is more reliable and fires the 6AL properly with a minimum of installation confusion. Similarly with the MSD coil, which is matched to the amp/CD system of the MSD.

It worked perfectly upon installation and triggers the multiple sparks correctly below 3000 rpm for which the MSD (Multiple Spark Discharge) coil is engineered. It significantly calmed the engine down at idle and kept the plugs cleaner at idle and starting than the old DuraSpark unit.

But, this doesn't mean i know the DuraSpark won't work; i didn't even bother to try. Probably, because i had such a hard time with the FORD unit working properly at idle and high rpm previously, i was happy to tank it.

Years and years ago, with a hot street 289 and Webers, i suffered the old ignition systems and fouled plugs w/lousy starting/idling seemingly forever until i discovered a fine Capacitive Discharge system from DELTA. It was in kit form, but easy to assemble and mount on its heat sink. CD was a fantastic improvement at the time and something of a hot rodders secret. Best $20 i ever spent at the time.

MSD, a modern CD system, is like that kind of improvement plus, with much more engineering improvements and the multiple sparks at lower rpm (where there is enough time between TDC frequencies to allow multiple pulses and allow coil field saturation).