The new coil. Take the wires off the terminals, check across them with an ohm meter.
If you get around 3 ohms, that coil is designed to run on a 12v system without a resistor.
If you get 1,5 ohms, that coil needs a 1.5 ohm resistor in series with the + terminal.
Regardless what the coil may say on the can, best to check it. If it needs a resistor, it will overheat the coil and burn the points. If it doesn't need a resistor, and there is one in the circuit, you will have very weak spark.
Another thing to check is side play in the distributor shaft. If any play, the points will not stay set, and can change with varying RPM and temperature. Once points are run out of adjustment, that can be arced and will not make good connection. The quality of today's points is bad. Might consider a Pertronix conversion.
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Today's Featured Article - Search For Spares - by Anthony West (UK). Following on from the aquisition of the old Fordson F, I was very much in need of spares. As a novice though I didn't appreciate the fact that there were so many Fordson tractors made, that all the other makes seem rare by comparison. As far as I was aware a fordson was a fordson and it was only through trial an
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