Looking at it where the spark plug wires are attached a distributor will have the center wire in the cap going to a separate round coil that is about 1/2 the length, and the same diameter as a ketchup squirt bottle. It may have a flange rib around it and be clamped in a metal bracket. The Mag will be a contained unit with the center wire going to a built in greyish black top on the unit. The mag will make spark with all wires disconnected from it, and never gets any power from the electrical system. (It makes its own) The distributor system might also be a Delco after market replacement that has a right angle drive with the cap pointing upward. (no mag looks like that) Some mags have been converted to be used as a coil system (and work OK) they have a coil as described above, and the unused built in coil on the top of the Mag. All coil systems need power through an ignition switch. All mags are grounded to stop with a similar looking, but very different switch. JimN
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Today's Featured Article - Case Farm Equipment - by Jeremy Sweeten. My name is Jeremy Sweeten and I am currently a junior at Purdue University. I am takin a dual major in Agriculture Systems Management and Agronomy. I am from North Central Indiana, Miami County to be exact. My dad teaches for Marion Community School Systems an outdoor lab called Asherwood. We live there to manage the place. They just happen to have a Case 311 with a Triple Range transmission. I grew up mowing, pushing snow, and hauling maple sap with it. In 1986 my parents bought an old,
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