The Delco, where the clips hook, the protrusions run all the way down the sides of the cap.
The IH, the base of the cap is round with small indentions near the top for the hooks.
I for one will defend the Pertronix conversion kits.
Have not had any negative experiences with them. I hear they have excellent, personal customer service, though I have never had the occasion to call.
Advantages of the conversion kit, it will work with a less than perfect distributor where there is some wear in the shaft bearings. Any wear and the points will not stay set. Points that will not stay set are doomed to a shortened life from arcing and burning.
The manufacturers of points, condensers, caps, etc. have all gone overseas. Poor quality, poor workmanship, some fail to work out of the box. None I have found will last like the old ones did.
What electronic conversion will not overcome is the use of the wrong coil/coil resistor combination. Use the wrong coil it will have weak spark, or burn out the module from too much amperage.
It will also not work properly with a distributor with a frozen centrifugal advance, bad wires, cap, rotor, plugs, or oil fouling plugs. It will not overcome any other engine problems, low compression, bad fuel delivery, or anything else that contributes to poor performance. All it is is a replacement for points. The timing will need to be checked after the kit is installed.
The manufacturers of the kits often try to push high performance coils, special wires, or other add on's. These are not necessary! A coil will only build as much voltage as it needs to discharge.
A set of spiral core resistor wires is the best match.
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Today's Featured Article - Tuning-Up Your Tractor: Plugs & Compression Testing - by Curtis Von Fange. The engine seems to run rough. In the exhaust you can hear an occasion 'poofing' sound like somethings not firing on all cylinders. Under loaded conditions the tractor seems to lack power and it belches black smoke out of the exhaust. For some reason it just doesn't want to start up without cranking and cranking the starter. All these conditions can be signals that your unit is in need of a tune up. Ok, so what is involved in a tune up? You say, swap plugs and file the points....now tha
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